List of top Physics Questions on Magnetic Field asked in CUET (UG)

A charged particle with charge \( q \) and velocity \( \vec{v} \) moves perpendicular to a magnetic field \( \vec{B} \). The radius of the circular path is \( r \). What is the expression for \( r \)?
The coercivity of a bar magnet is 140 A m\(^{-1}\). To demagnetize it, it is placed inside a solenoid of length 1.6 m and number of turns 112. What is the current flowing through the solenoid?
If a copper wire carries a direct current, the magnetic field associated with the current would be:
A bar magnet when suspended horizontally and perpendicular to earth's field experiences a torque of 3 x 10-4 Nm. The Magnetic moment of the magnet would be:
(take horizontal component of Earth's magnetic field at the place 0.4 × 10-4T)
An electron is shot into the uniform magnetic field normal to the direction of the field. Then the frequency of revolution of the electron and its circular orbit:
An electron is projected in a uniform magnetic field along the direction of the field, the electron will experience:
A proton and an Alpha particle moving with the same kinetic energy enter the range of a uniform magnetic field perpendicular to it. the ratio radii of their trajectors will be
Magnetic field due to the current carrying wire as shown in the figure at point “O” will be:
The magnetic field of a plane electromagnetic wave is given by B_x=2✕10-7sin(0.6✕103y+2✕1011t)T.An expression for its electric field is: