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JEE Mathematics in Physics PYQs with Solutions

222 previous year questions from Mathematics in Physics (JEE Main & Advanced Physics) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

222 questionsPhysics2002–2026Answers + solutions

About Mathematics in Physics PYQs

Mathematics in Physics has 222 previous year questions in the Quantrex Academy JEE Main & Advanced Physics bank. The 220 questions in this list come from JEE Main (147), 99 Percentile Qs Bank for JEE Main (30), Highly selective Backlog Qs for JEE Main (20) and 3 other sources, spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2026: 3
  • 2025: 8
  • 2024: 20
  • 2023: 14
  • 2022: 14
  • 2021: 25
  • 2020: 8
  • 2019: 14
  • 2018: 6
  • 2017: 3
  • 2016: 3
  • 2015: 3

Mathematics in Physics questions with solutions

1

The density ρ of a uniform cylinder is determined by measuring its mass m , length l and diameter d . The measured values of m , l and d are 97.42 ± 0.02 g, 8.35 ± 0.05 mm and

JEE Main 2026 Solution View → 2

Four persons measure the length of a rod as 20.00 ~cm, 19.75 ~cm, 17.01 ~cm and 18.25 cm. The relative error in the measurement of average length of the rod is :

JEE Main 2026 Solution View → 3

In an experiment the values of two spring constants were measured as k_ 1 =(10 ± 0.2) N / m and k_ 2 =(20 ± 0.3) N / m . If these springs are connected in parallel, then the

JEE Main 2026 Solution View → 4

Length, breadth and thickness of a strip having a uniform cross section are measured to be 10.5 cm , 0.05 mm , and 6.0 μ ~m , respectively. Which of the following option(s)

JEE Advanced 2025 Solution View → 5

A quantity Q is formulated as X^ -2 Y^ +(3)/(2) Z^ -(2)/(5) · X, Y and Z are independent parameters which have fractional errors of 0.1,0.2 and 0.5 , respectively in measurement.

JEE Main 2025 Solution View → 6

A physical quantity C is related to four other quantities p, q, r and s as follows C= pq^2 r^3 ~s The percentage errors in the measurement of p, q, r and s are 1 \%, 2 \% 3 \% and

JEE Main 2025 Solution View → 7

A physical quantity Q is related to four observables a, b, c, d as follows : Q= ab ^4 ~cd where, a=(60 ± 3) Pa ; b=(20 ± 0.1) m ; c=(40 ± 0.2) Nsm^ -2 and d=(50 ± 0.1) m , then

JEE Main 2025 Solution View → 8

For an experimental expression y=(32.3 × 1125)/(27.4) , where all the digits are significant. Then to report the value of y we should write

JEE Main 2025 Solution View → 9

The energy of a system is given as E(t)=α^3 e^ -β t , where t is the time and β=0.3 ~s^ -1 . The errors in the measurement of α and t are 1.2 \% and 1.6 \% , respectively. At t=5

JEE Main 2025 Solution View → 10

Two particles are located at equal distance from origin. The position vectors of those are represented by A =2 i +3 n j +2 k and B =2 i -2 j +4 p k , respectively. If both the

JEE Main 2025 Solution View → 11

The maximum percentage error in the measurment of density of a wire is [Given, mass of wire =(0.60 ± 0.003) g radius of wire =(0.50 ± 0.01) cm length of wire =(10.00 ± 0.05) cm]

JEE Main 2025 Solution View → 12

The dimensions of a cone are measured using a scale with a least count of 2 ~mm . The diameter of the base and the height are both measured to be 20.0 ~cm . The maximum percentage

JEE Advanced 2024 Solution View → 13

The resultant of two vectors A and B is perpendicular to A and its magnitude is half that of B . The angle between vectors A and B is ______ ∘ .

JEE Main 2024 Solution View → 14

If a and b makes an angle ^ -1 ((5)/(9)) with each other, then | a + b |= 2 | a - b | for | a |=n| b | The integer value of n is ____

JEE Main 2024 Solution View → 15

In an expression a × 10^ b ;

JEE Main 2024 Solution View → 16

Young's modulus is determined by the equation given by Y=49000 m l dyn cm^2 where M is the mass and l is the extension of wire used in the experiment. Now error in Young modules

JEE Main 2024 Solution View → 17

Three vectors OP , OQ and OR each of magnitude A are acting as shown in figure. The resultant of the three vectors is A x . The value of x is ________ .

JEE Main 2024 Solution View → 18

To find the spring constant (k) of a spring experimentally, a student commits 2 \% positive error in the measurement of time and 1 \% negative error in measurement of mass. The

JEE Main 2024 Solution View → 19

For three vectors A =(-x i -6 j -2 k ), B =(- i +4 j +3 k ) and C =(-8 i - j +3 k ) , if A ·( B × C )=0 , then value of x is _________

JEE Main 2024 Solution View → 20

A particle moves in x-y plane under the influence of a force F such that its linear momentum is p (t)= i (kt)- j (kt) . If k is constant, the angle between F and p will be :

JEE Main 2024 Solution View → 21

The angle between vector Q and the resultant of (2 Q +2 P ) and (2 Q -2 P ) is :

JEE Main 2024 Solution View → 22

Time periods of oscillation of the same simple pendulum measured using four different measuring clocks were recorded as 4.62 ~s, 4.632 ~s, 4.6 ~s and 4.64 ~s . The arithmetic mean

JEE Main 2024 Solution View → 23

In an experiment to measure focal length (f) of convex lens, the least counts of the measuring scales for the position of object (u) and for the position of image (v) are Δ u and

JEE Main 2024 Solution View → 24

Two forces F _1 and F _2 are acting on a body. One force has magnitude thrice that of the other force and the resultant of the two forces is equal to the force of larger

JEE Main 2024 Solution View → 25

Match List - I with List - II. List - I (Number) List - II (Signficant figure) (A) 1001 (I) 3 (B) 010 . 1 (II) 4 (C) 100 . 100 (III) 5 (D) 0 . 0010010 (IV) 6 Choose the correct

JEE Main 2024 Solution View → 26

The radius (r) , length (l) and resistance (R) of a metal wire was measured in the laboratory as r = (0 .35 ± 0 .05)cm , R = (100 ± 10)ohm , l = (15 ± 0 .2)cm The percentage error

JEE Main 2024 Solution View → 27

If two vectors → A and → B having equal magnitude R are inclined at an angle θ , then

JEE Main 2024 Solution View → 28

If the percentage errors in measuring the length and the diameter of a wire are 0 . 1 % each. The percentage error in measuring its resistance will be:

JEE Main 2024 Solution View → 29

A vector has magnitude same as that of → A = 3 ^ j + 4 ^ j and is parallel to → B = 4 ^ i + 3 ^ j . The x and y components of this vector in first quadrant are x and 3

JEE Main 2024 Solution View → 30

A physical quantity Q is found to depend on quantities a, b, c by the relation Q = a ^ 4 b ^ 3 c ^ 2 . The percentage error in a, b and c are 3 % , 4 % and 5 % respectively. Then

JEE Main 2024 Solution View → 31

The resistance R = (V)/(I) , where V = ( 200 ± 5 ) V and I = ( 20 ± 0 . 2 ) A , the percentage error in the measurement of R is :

JEE Main 2024 Solution View → 32

In an experiment for determination of the focal length of a thin convex lens, the distance of the object from the lens is 10 ± 0 . 1cm and the distance of its real image from the

JEE Advanced 2023 Solution View → 33

A vector in x - y plane makes an angle of 30 ^ o with y -axis. The magnitude of y -component of vector is 2 3 . The magnitude of x -component of the vector will be :

JEE Main 2023 Solution View → 34

Three forces F _ 1 = 10N, F _ 2 = 8N, F _ 3 = 6N are acting on a particle of mass 5kg . The forces F _ 2 and F _ 3 are applied perpendicularly so that particle remains at rest. If

JEE Main 2023 Solution View → 35

When vector → A = 2 ^ i + 3 ^ j + 2 ^ k is subtracted from vector → B , it gives a vector equal to 2 ^ j . Then the magnitude of vector → B will be:

JEE Main 2023 Solution View → 36

A physical quantity P is given as P = a ^ 2 b ^ 3 c d . The percentage error in the measurement of a, b, c and d are 1 % , 2 % , 3 % and 4 % respectively. The percentage error in

JEE Main 2023 Solution View → 37

A cylindrical wire of mass ( 0 . 4 ± 0 . 01 ) g has length ( 8 ± 0 . 04 ) cm and radius ( 6 ± 0 . 03 ) mm . The maximum error in its density will be

JEE Main 2023 Solution View → 38

Two forces having magnitude A and (A)/(2) are perpendicular to each other. The magnitude of their resultant is:

JEE Main 2023 Solution View → 39

Two resistance are given as R _ 1 = ( 10 ± 0 . 5 ) Ω and R _ 2 = ( 15 ± 0 . 5 ) Ω . The percentage error in the measurement of equivalent resistance when they are connected in

JEE Main 2023 Solution View → 40

The length of a metallic wire is increased by 20 % and its area of cross-section is reduced by 4 % . The percentage change in resistance of the metallic wire is ________ .

JEE Main 2023 Solution View → 41

A body is moving with constant speed, in a circle of radius 10m . The body completes one revolution in 4s . At the end of 3rd second, the displacement of body (in m ) from its

JEE Main 2023 Solution View → 42

In an experiment of measuring the refractive index of a glass slab using travelling microscope in physics lab, a student measures real thickness of the glass slab as 5 . 25mm and

JEE Main 2023 Solution View → 43

If → P = 3 ^ i + 3 ^ j + 2 ^ k and → Q = 4 ^ i + 3 ^ j + 2 . 5 ^ k then, the unit vector in the direction of → P × → Q is (1)/(x) ( 3 ^ i + ^ j - 2 3 ^ k ) . The value of x is

JEE Main 2023 Solution View → 44

If two vectors → P = ^ i + 2m ^ j + m ^ k and → Q = 4 ^ i - 2 ^ j + m ^ k are perpendicular to each other. Then, the value of m will be

JEE Main 2023 Solution View → 45

Vectors a ^ i + b ^ j + ^ k and 2 ^ i - 3 ^ j + 4 ^ k are perpendicular to each other when 3a + 2b = 7 , the ratio of a to b is (x)/(2) . The value of x is _____.

JEE Main 2023 Solution View → 46

In an experiment to find acceleration due to gravity (g) using simple pendulum, time period of 0 . 5s is measured from time of 100 oscillation with a watch of 1s resolution. If

JEE Main 2022 Solution View → 47

If the projection of 2 ^ i + 4 ^ j - 2 ^ k on ^ i + 2 ^ j + α ^ k is zero. Then, the value of α will be

JEE Main 2022 Solution View → 48

A torque meter is calibrated to reference standards of mass, length and time each with 5 % accuracy. After calibration, the measured torque with this torque meter will have net

JEE Main 2022 Solution View → 49

If → A = (2 ^ i + 3 ^ j - ^ k )m and → B = ( ^ i + 2 ^ j + 2 ^ k )m . The magnitude of component of vector → A along vector → B will be _____ m .

JEE Main 2022 Solution View → 50

In an experiment of determine the Young's modulus of wire of a length exactly 1m , the extension in the length of the wire is measured as 0 . 4mm with an uncertainty of ± 0 .

JEE Main 2022 Solution View → 51

The maximum error in the measurement of resistance, current and time for which current flows in an electrical circuit are 1 % , 2 % and 3 % respectively. The maximum percentage

JEE Main 2022 Solution View → 52

A person moved from A to B on a circular path as shown in figure. If the distance travelled by him is 60m , then the magnitude of displacement would be : (Given cos135 ° = - 0 . 7

JEE Main 2022 Solution View → 53

Two vectors → A and → B have equal magnitudes. If magnitude of → A + → B is equal to two times the magnitude of → A - → B , then the angle between → A and → B will be

JEE Main 2022 Solution View → 54

The distance of the Sun from earth is 1 . 5 × 10 ^ 11 m and its angular diameter is 2000 '' when observed from the earth. The diameter of the Sun will be

JEE Main 2022 Solution View → 55

A silver wire has a mass (0 . 6 ± 0 . 006)g , radius (0 . 5 ± 0 . 005)mm and length (4 ± 0 . 04)cm . The maximum percentage error in the measurement of its density will be

JEE Main 2022 Solution View → 56

For z = a ^ 2 x ^ 3 y(1)/(2) , where ' a ' is a constant. If percentage error in measurement of ' x ' and ' y ' are 4 % and 12 % , respectively, then the

JEE Main 2022 Solution View → 57

If Z = A ^ 2 B ^ 3 C ^ 4 , then the relative error in Z will be

JEE Main 2022 Solution View → 58

→ A is a vector quantity such that | → A | = non-zero constant. Which of the following expression is true for → A ?

JEE Main 2022 Solution View → 59

Which of the following relations is true for two unit vector ^ A and ^ B making an angle θ to each other?

JEE Main 2022 Solution View → 60

A student determined Young's Modulus of elasticity using the formula Y = Mg L ^ 3 4 bd ^ 3 δ . The value of g is taken to be 9 . 8m s ^ - 2 without any significant error, his

JEE Main 2021 Solution View → 61

Statement I: If three forces → F 1, → F 2 and → F 3 are represented by three sides of a triangle and → F _ 1 + → F _ 2 = - → F 3, then these three forces are concurrent forces and

JEE Main 2021 Solution View → 62

Statement-I : Two forces ( → P + → Q ) and ( → P - → Q ) where → P ⊥ → Q , when act at an angle θ _ 1 each other, the magnitude of their resultant is 3( P ^ 2 + Q ^ 2 ) , when

JEE Main 2021 Solution View → 63

The resultant of these forces → OP , → OQ , → OR , → OS and → OT is approximately ______ N . [Take 3 = 1 . 7, 2 = 1 . 4 Given ^ i and ^ j unit vectors along x, y axis]

JEE Main 2021 Solution View → 64

If the length of the pendulum in pendulum clock increases by 0 . 1 % , then the error in time per day is:

JEE Main 2021 Solution View → 65

The angle between vector ( → A ) and ( → A - → B ) is :

JEE Main 2021 Solution View → 66

The acceleration due to gravity is found up to an accuracy of 4 % on a planet. The energy supplied to a simple pendulum of known mass m to undertake oscillations of time period T

JEE Main 2021 Solution View → 67

The magnitude of vectors → OA , → OB and → OC in the given figure are equal. The direction of → OA + → OB - → OC with x - axis will be:

JEE Main 2021 Solution View → 68

A physical quantity y is represented by the formula y = m ^ 2 r ^ - 4 g ^ x l ^ - (3)/(2) If the percentage errors found in y, m, r, l and g are 18, 1, 0 . 5, 4 and p

JEE Main 2021 Solution View → 69

AssertionA: If A, B, C, D are four points on a semi-circular arc with a centre at O such that | → AB | = | → BC | = | → CD | . Then, → AB + → AC + → AD = 4 → AO + → OB + → OC

JEE Main 2021 Solution View → 70

Two vectors → X and → Y have equal magnitude. The magnitude of ( → X - → Y ) is n times the magnitude of ( → X + → Y ) . The angle between → X and → Y is :

JEE Main 2021 Solution View → 71

Match List I with List II. List I List II (a) → C - → A - → B = 0 (i) (b) → A - → C - → B = 0 (ii) (c) → B - → A - → C = 0 (iii) (d) → A + → B = - → C (iv) Choose the correct

JEE Main 2021 Solution View → 72

What will be the projection of vector → A = ^ i + ^ j + ^ k on vector → B = ^ i + ^ j ?

JEE Main 2021 Solution View → 73

Three particles P, Q and R are moving along the vectors → A = ^ i + ^ j , → B = ^ j + ^ k and → C = - ^ i + ^ j , respectively. They strike on a point and start to move in

JEE Main 2021 Solution View → 74

Three students S _ 1 , S _ 2 and S _ 3 perform an experiment for determining the acceleration due to gravity ( g ) using a simple pendulum. They use different lengths of pendulum

JEE Main 2021 Solution View → 75

Two vectors → P and → Q have equal magnitudes. If the magnitude of → P + → Q is n times the magnitude of → P - → Q , then angle between → P and → Q is

JEE Main 2021 Solution View → 76

If → A and → B are two vectors satisfying the relation → A · → B = | → A × → B | . Then the value of | → A - → B | will be:

JEE Main 2021 Solution View → 77

The radius of a sphere is measured to be ( 7 . 50 ± 0 . 85 ) cm . Suppose the percentage error in its volume is x . The value of x , to the nearest x , is ___ .

JEE Main 2021 Solution View → 78

The time period of a simple pendulum is given by T = 2π (l)/(g) . The measured value of the length of the pendulum is 10cm known to a 1mm accuracy. The time for 200 oscillations

JEE Main 2021 Solution View → 79

In order to determine the Young's Modulus of a wire of radius 0 . 2cm (measured using a scale of least count = 0 . 001cm ) and length 1m (measured using a scale of least count

JEE Main 2021 Solution View → 80

The resistance R = (V)/(I) , where V = (50 ± 2)V and I = (20 ± 0 . 2)A . The percentage error in R is x % . The value of x to the nearest integer is ________.

JEE Main 2021 Solution View → 81

A wire of 1Ω has a length of 1m . It is stretched till its length increases by 25 % . The percentage change in resistance to the nearest integer is :

JEE Main 2021 Solution View → 82

If → P × → Q = → Q × → P , the angle between → P and → Q is θ(0 ° < θ < 360 °) . The value of θ will be ___ ° .

JEE Main 2021 Solution View → 83

In an octagon ABCDEFGH of equal side, what is the sum of → AB + → AC + → AD + → AE + → AF + → AG + → AH , if, → AO = 2 ^ i + 3 ^ j - 4 ^ k

JEE Main 2021 Solution View → 84

The period of oscillation of a simple pendulum is T = 2π (L)/(g) . Measured value of L is 1 . 0m from meter scale having a minimum division of 1mm and time of one complete

JEE Main 2021 Solution View → 85

Two capacitors with capacitance values C _ 1 = (2000 ± 10)pF and C _ 2 = (3000 ± 15)pF are connected in series. The voltage applied across this combination is V = (5 . 00 ± 0 .

JEE Advanced 2020 Solution View → 86

The density of a solid metal sphere is diameter. The maximum error in the density of the sphere is ((x)/(100)) % . If the relative errors in measuring the mass and the diameter

JEE Main 2020 Solution View → 87

A physical quantity z depends on four observables a, b, c and d , as z = a ^ 2 b ^ 2 / 3 c d ^ 3 . The percentage of error in the measurement of a, b, c and d are 2 % , 1 . 5 %

JEE Main 2020 Solution View → 88

For the four sets of three measured physical quantities as given below. Which of the following options is correct? (i) A _ 1 = 24.36, B _ 1 = 0.0724, C _ 1 = 256.2 (ii) A _ 2 =

JEE Main 2020 Solution View → 89

A simple pendulum is being used to determine the value of gravitational acceleration g at a certain place. The length of the pendulum is 25.0cm and a stopwatch with 1s resolution

JEE Main 2020 Solution View → 90

The sum of two forces → P and → Q is → R such that | → R | = | → P |. Find the angle between resultant of2 → P and → Q and → Q , ________

JEE Main 2020 Solution View → 91

The resultant of two vectors is perpendicular to first vector of magnitude 6N . If the resultant has magnitude 6 3 N , then magnitude of second vector is

NTA Abhyas JEE Main 2020 Solution View → 92

Two forces A and B whose magnitude are in the ratio 3: 5 give a resultant of 28N . If the angle of their inclination is 60 ^ ° , then the magnitude of force B will be ----- N .

NTA Abhyas JEE Main 2020 Solution View → 93

The area of a square is 5.29c m ^ 2 . The area of 7 such squares taking into account the significant figures is:

JEE Main 2019 Solution View → 94

In the density measurement of a cube, the mass and edge length are measured as (10.00 ± 0.10)kg and (0.10 ± 0.01)m, respectively. The error in the measurement of density is:

JEE Main 2019 Solution View → 95

Let | → A _ 1 | = 3, | → A _ 2 | = 5 and | → A _ 1 + → A _ 2 | = 5 . The value of (2 → A _ 1 + 3 → A _ 2 ) ∙ (3 → A _ 1 - 2 → A _ 2 ) is:

JEE Main 2019 Solution View → 96

In a simple pendulum experiment for determination of acceleration due to gravity ( g ) , time taken for 20 oscillations is measures by using a watch of 1 second least count. The

JEE Main 2019 Solution View → 97

Ship A is sailing towards north-east with velocity) → v = 30 ^ i + 50 ^ j km h ^ - 1 where ^ i points east and ^ j , north. The ship B is at a distance of 80km east and 150km

JEE Main 2019 Solution View → 98

A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle 60 ^ o with ground level, but he finds the aeroplane right vertically above

JEE Main 2019 Solution View → 99

A particle moves from the point (2.0 i +4.0 j ) m, at t=0 , with an initial velocity (5.0 i +4.0 j ) ms^ -1 . It is acted upon by a constant force which produces a constant

JEE Main 2019 Solution View → 100

The diameter and height of a cylinder are measured by a meter scale to be 12.6 ± 0.1cm and 34.2 ± 0.1cm , respectively. What will be the value of its volume in appropriate

JEE Main 2019 Solution View → 101

Two vectors → A and → B have equal magnitudes. The magnitude of ( → A + → B ) is &#39; n &#39; times the magnitude of ( → A - → B ) . The angle between → A and → B is:

JEE Main 2019 Solution View → 102

Two forces P and Q , of magnitude 2F and 3F , respectively, are at an angle θ with each other. If the force Q is doubled, then their resultant also gets doubled. Then, the angle θ

JEE Main 2019 Solution View → 103

In the cube of side &#39;a&#39; shown in the figure, the vector from the central point of the face ABOD to the central point of the face BEFO will be:

JEE Main 2019 Solution View → 104

The position co-ordinates of a particle moving in a 3D coordinate system is given by x = acos ⁡ y = asin ⁡ and z = a The speed of the particle is:

JEE Main 2019 Solution View → 105

A particle is moving with a velocity → v = K(y ^ i + x ^ j ), where K is a constant. The general equation for its path is:

JEE Main 2019 Solution View → 106

A copper wire is stretched to make it 0.5% longer. The percentage change in its electrical resistance if its volume remains unchanged is:

JEE Main 2019 Solution View → 107

Paragraph: If the measurement errors in all the independent quantities are known, then it is possible to determine the error in any dependent quantity. This is done by the use of

JEE Advanced 2018 Solution View → 108

Let → A = ( ^ i + ^ j )and → B = ( 2 ^ i - ^ j ) . The magnitude of a coplanar vector → C such that → A . → C = → B . → C = → A . → B is given by:

JEE Main 2018 Solution View → 109

The percentage errors in quantities P , Q , R and S are 0 . 5 % , 1 % , 3 % and 1 . 5 % respectively in the measurement of a physical quantity A= P ^ 3 Q ^ 2 R S . The maximum

JEE Main 2018 Solution View → 110

The relative error in the determination of the surface area of a sphere is α . Then the relative error in the determination of its volume is

JEE Main 2018 Solution View → 111

The relative error in the determination of the surface area of a sphere is α . The relative error in the determination of its volume is

JEE Main 2018 Solution View → 112

The density of a material, in the shape of a cube, is determined by measuring three sides of the cube and its mass. If the relative errors in measuring the mass and length are 1 .

JEE Main 2018 Solution View → 113

A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact with the bottom of the well. The error in his

JEE Advanced 2017 Solution View → 114

A physical quantity P is described by the relation P = a ^ (1)/(2) b ^ 2 c ^ 3 d ^ - 4 . If the relative errors in the measurement of a , b , c and d respectively, are 2 % , 1 %

JEE Main 2017 Solution View → 115

The following observations were taken for determining surface tension T of water by capillary method: diameter of capillary, D = 1.25 × 10 ^ - 2 m rise of water, h = 1.45 × 10 ^

JEE Main 2017 Solution View → 116

In an experiment to determine the acceleration due to gravity g, the formula used for the time period of a periodic motion is T = 2π (7(R - r))/(5g) . The values of R and r are

JEE Advanced 2016 Solution View → 117

A thin 1m long rod has a radius of 5mm . A force of 50 π × 10 ^ 3 N is applied at one end to determine its Young&#39;s modulus. Assume that the force is exactly known. If the

JEE Main 2016 Solution View → 118

A student measures the time period of 100 oscillations of a simple pendulum four times. The data set is 90 s, 91 s, 95 s and 92 s. If the minimum division in the measuring clock

JEE Main 2016 Solution View → 119

The energy of a system as a function of time t is given as E(t) = A ^ 2 (- ) , where α = 0.2 s ^ - 1 . The measurement of A has an error of 1.25%. If the error in the measurement

JEE Advanced 2015 Solution View → 120

A vector → A is rotated by a small angle ∆ θ radians (∆ θ ≪ 1) to get a new vector → B . In that case | → B - → A | is :

JEE Main 2015 Solution View →
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