A circular coil of radius 6 cm and 20 turns rotates about its vertical diameter with an angular speed of `40"rad"s^(-1)` in a uniform horizontal magnetic field of magnitude `2xx10^(-2)T`. If the coil form a closed loop of resistance `8omega`, then the average power loss due to joule heating is

Options

A. `2.07 xx 10^(-3) W`
B. `1.23 xx 10^(-3) W`
C. `3.14 xx 10^(-3) W`
D. `1.80 xx 10^(-3) W`

Answer

A

Explanation

`2.07 xx 10^(-3) W`