MagnetismHard
Question
The square loop ABCD, carrying a current I, is placed in a uniform magnetic field B, as shown. The loop can rotate about the axis XX′. The plane of the loop makes an angle θ (θ < 90o) with the direction of B. Through what angle will the loop rotate by itself before the torque on it becomes zero -
Options
A.θ
B.90o - θ
C.90o + θ
D.180o + θ
and 
is 
More Magnetism Questions
A proton and an α-particle, moving with the same velocity, enter a uniform magnetic field, acting normal to the pla...Which of the field patterns given below is valid for electric field as well as for magnetic field?...A thin flexible wire of length L is connected to two adjacent fixed points and carries a current I in theclockwise direc...A particle with charge q and mass m starts its motion from origin with a velocity . A uniform magnetic field exists ever...All straight wires are very long. Both AB and CD are arcs of the same circle, both sub tending right angles at the centr...