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Magnetic Effects of Current — BITSAT Physics PYQs

36 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.

Magnetic Effects of Current — BITSAT Physics PYQs

The straight wire A B carries a current I . The ends of the wire subtend angles ₁ and ₂ at the point P as shown in figure. The magnetic field at the point P is

A long straight wire of radius a carries a steady current 1 . The current is uniformly distributed across its cross section. The ratio of the magnetic field at a 2 and 2a from axis

The electrostatic force ( F ₁ ) and magnetic force ( F ₂ ) acting on a charge q moving with velocity v can be written:

The magnetic moments associated with two closely wound circular coils A and B of radius r_A=10 ~cm and r_B=20 ~cm respectively are equal if: (Where N _A, I _A and N _ B , I _ B are

A solenoid of 1200 turns is wound uniformly in a single layer on a glass tube 2 ~m long and 0.2 ~m in diameter. The magnetic intensity at the center of the solenoid when a current

A charge particle is moving in a uniform magnetic field (2 i +3 j ) T . If it has an acceleration of ( i -4 j ) m / s ^2 , then the value of will be :

The magnetic moment of an electron (e) revolving in an orbit around nucleus with an orbital angular momentum is given by:

A proton moving with a velocity 3 10⁵ ~m / s enters a magnetic field of 0.3 tesla at an angle of 30^ with the field. The radius of curvature of its path will be ( e / m for proton

A solenoid is 2 ~m long and 3 ~cm in diameter. It has 5 layers of winding of 1000 turns each and carries a current of 5 ~A . What is the magnetic field at its centre ? Use the stan

An electron moves in a circular arc of radius 10 m at a contant speed of 2 10⁷ ~ms ⁻¹ with its plane of motion normal to magnetic flux density of 10⁻⁵ ~T . What will be the value o

An electron revolves in a circular orbit of radius r with angular speed &#969; . The magnetic field at the centre of electron orbit is

Two electrons are moving with equal speed of 5 &#215; 10 5 m s - 1 parallel to each other. The ratio of the electrostatic to the magnetic force between them is

The magnetic field at the centre O of the current-carrying square loop shown in the figure is

A proton is revolving on a circular path of radius 2 mm with frequency 10 Hz . Magnetic dipole moment associated with proton is

A current i flows through a loop as shown in figure. The magnetic field at the Centre O is

The ratio of angular momentum L to the atomic dipole moment &#956; i for hydrogen like atoms and ions is

A copper rod of mass m slides under gravity on two smooth parallel rails l distance apart and set an angle &#952; to the horizontal. At the bottom, the rails are joined by a resist

To increase the current sensitivity of a moving coil galvanometer by 50 % , its resistance is increased, so that new resistance becomes twice its initial resistance, by what factor

A positive charge q is projected in magnetic field of width m v 2 q B with velocity v . Then, the time taken by charged particle to emerge from the magnetic field is

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that B is in plane of the coil. If due to a current i in th

What is the magnetic field at the centre of arc in the figure below?

A deuteron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 metre in a plane perpendicular to the magnetic field B . The kinetic energy of the proton that desc

A wire carrying current I has the shape as shown in adjoining figure. Linear parts of the wire are very long and parallel to X -axis while semicircular portion of radius R is lying

A charged particle moving in a uniform magnetic field and losses 4 % of its kinetic energy. The radius of curvature of its path changes by

Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of r

A long straight wire along the Z -axis carries a current I in the negative Z -direction. The magnetic vector field B at a point having coordinates (x, y) in the Z=0 plane is

A narrow beam of protons and deuterons, each having the same momentum, enters a region of uniform magnetic field directed perpendicular to their direction of momentum. The ratio of

Two parallel conductors carry current in opposite directions as shown in figure. One conductor carries a current of 10.0 ~A . Point C is a distance d 2 to the right of the 10.0 ~A

A uniform electric field and uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is poi

A horizontal overhead powerline is at height of 4 ~m from the ground and carries a current of 100 ~A from east to west. The magnetic field directly below it on the ground is ( ₀=4

If m is magnetic moment and B is the magnetic field, then the torque is given by

Magnetic moment of bar magnet is M . The work done to turn the magnet by 90^ of magnet in direction of magnetic field B will be

A steady current is set up in a cubic network composed of wires of equal resistance and length d as shown in figure. What is the magnetic field at the centre P due to the cubic net

If M is magnetic moment and B is the magnetic field, then the torque is given by

The magnetic field at the origin due to the current flowing in the wire is -

A conducting circular loop of radius r carries a constant current i . It is placed in a uniform magnetic field B ₀ such that B ₀ is perpendicular to the plane of the loop. The magn

An electron revolves in a circular orbit of radius r with angular speed ω . The magnetic field at the centre of electron orbit is

Two electrons are moving with equal speed of 5 × 10 5 m s - 1 parallel to each other. The ratio of the electrostatic to the magnetic force between them is

The ratio of angular momentum L to the atomic dipole moment μ i for hydrogen like atoms and ions is

A copper rod of mass m slides under gravity on two smooth parallel rails l distance apart and set an angle θ to the horizontal. At the bottom, the rails are joined by a resist