Question

A bar magnet of length 10cm and pole strength 2 Am makes an angle $60^{\circ}$ with a uniform malefic field of induction 50T . The couple acting on it is.

• A. $5\sqrt3 Nm$
• B. $\sqrt3 Nm$
• C. $10\sqrt3 Nm$
• D. $20\sqrt3 Nm$

Answer 1

Answer: (A)

$5\sqrt3 Nm$

Answer 2

$C = (2l) mB \, \sin \, \theta$