The torque required to hold a small circular coil of 10 turns, area 1 mm 2 and carrying a…
Physics · Class 12 · CBSE — Moving Charges and Magnetism
The torque required to hold a small circular coil of 10 turns, area 1 mm2 and carrying a current of \(\left(\frac{21}{44}\right) \mathrm{A}\) in the middle of a long solenoid of 103 turns/m carrying a current of 2.5 A, with its axis perpendicular to the axis of the solenoid is
- 1.5 × 10–6 N m
- 1.5 × 10–8 N m
- 1.5 × 106 N m
- 1.5 × 108 N m
Answer
(B) 1.5 × 10 –8 N m
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