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Magnetic Effects of Current — JEE Main & Advanced NSEP PYQs

23 previous year questions from Magnetic Effects of Current with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

23 questionsNSEPSolutions on every page

A wire in the shape of a square frame carries a current I and produces a magnetic field B_ s at its centre. Now the wire is bent in the shape of a circle and carries the same curre

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A coil 2.0 cm in diameter has 300 turns. If the coil carries a current of 10 mA and lies in a magnetic field 5 10⁻² ~T , the maximum torque experienced by the coil is

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An infinitely long straight non-magnetic conducting wire of radius a carries a dc current I . The magnetic field B , at a distance r(r < a) from axis of the wire is

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A neutral metal bar moves at a constant velocity v to the right through a region of uniform magnetic field directed out of the page, as shown. Therefore,

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Paragraph: The following questions are concerned with experiments on the characterization and use of a moving coil galvanometer. The series combination of a variable resistance R ,

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A rectangular loop carrying a current is placed in a uniform magnetic field. The net force acting on the loop

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The SI unit of permeability of free space is

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A tightly wound long solenoid carries a current 5 A . An electron shot perpendicular to the solenoid axis inside it revolves at a frequency 10^8 rev / s . The number of turns per m

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A fixed horizontal wire M carries 200 A current. Another wire N running parallel to M carries a current I and remains suspended in a vertical plane below M at a distance of 20 mm .

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A conducting wire is bent in the form of a n sided regular polygon enclosed by a circle of radius R . The magnetic field produced at its centre by a current i flowing through the w

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The magnetic dipole moment of an electron in the S state of hydrogen atom revolving in a circular orbit of radius 0.0527 nm with a speed 2.2 10^6 ~m / s is

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Mysteriously a charged particle moving with velocity v =v₀ entered the tube of Thomson's apparatus where the parallel metallic plates of length 5 cm along X axis are separated by 2

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A spherical capacitor is formed by two concentric metallic spherical shells. The capacitor is then charged so that the outer shell carries a positive charge and the inner shell car

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The unit of magnetizing field is

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Knowing that the parallel currents attract, the inward pressure on the curved surface of a thin walled, long hollow metallic cylinder of radius R =50 ~cm carrying a current of i =2

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What is the magnetic induction B at the centre O of the semicircular arc if a current carrying wire has shape of an hair pin as shown in figure? The radius of the curved part of th

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Two long parallel wires carry currents of equal magnitude (I) but in opposite directions. These wires are suspended from fixed rod PQ by four chords of equal length L as shown. The

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A metal bar of length moves with a velocity v parallel to an infinitely long straight wire carrying a current I as shown in the figure. If the nearest end of the perpendicular bar

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A thin and infinitely long metal sheet of appreciable finite width b carrying current I (distributed uniformly through out of its cross section) parallel to its length is placed in

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An insulating rod of length/carries a charge q distributed uniformly all over its length. The rod is pivoted at its midpoint and is rotated at a frequency f( in Hz ) about an axis

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Current I flows through a long thin walled metallic cylinder of radius R with a thin longitudinal slit of width ( R) running parallel to the axis of the cylinder. The magnetic indu

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A long straight wire carrying a current i=10 ~A and a rectangular metallic loop of dimensions b c lie in the same plane as shown in the figure. The parameters are a=10 ~cm , b=30 ~

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A U-shaped conducting wire of mass m=10 g , having length of its horizontal section as =20 ~cm , is free to move vertically up and down. The two ends of the wire are immersed in me

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