A metallic ring of radius a and resistance R is held fixed with its axis along a spatially uniform magnetic field whose magnitude is `B_(0)` sin `(omega t)`. Neglect gravity. Then,

Options

A. the current in the ring oscillates with a frequency of `2 omega` .
B. the joule hearting loss in the ring is proportional to `a^(2)`,
C. the force per unit length on the ring will be proportional to `B_(0)^(2)`.
D. the net force on the ring is non-zero

Answer

C