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Standard XII
Physics
NCERT
Question

A circular coil placed in a uniform magnetic field. If alternating current flows through this coil then
  1. Net force will act on coil
  2. Coil will be stationary
  3. Coil will be rotated
  4. None of the above

A
Coil will be stationary
B
None of the above
C
Net force will act on coil
D
Coil will be rotated
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Solution
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Given: Current carrying circular coil in a uniform magnetic field
Solution : When a current carrying circular coil is placed in a uniform magnetic field then torque acting on the coil will not be zero which leads to rotation of coil.
Hence the correct option is C

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