A magnetic needle is kept in a non uniform magnetic field . It experiences
A
a force and a torque
B
a force but not a torque
C
a torque but not a force
D
nither a force nor a torque
Text Solution
Verified by Experts
The correct Answer is:
B
If the plane of magnetic field and the coil are hoizontal and vertical respectively then `theta=0`. Thus, torque on the coil is given by , `tau_(n)=n IAB cos theta= n IAB cos 0 = n IAB`.
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