TOPIC : MAGNETISM
Number of questions are 294, Select_Question:

QUESTION
Q1) bar magnet of magnetic moment 200 A-m2 is suspended in a magnetic field of intensity 0.25N/Am. The couple required to deflect it through 30° is ...[ AFMC 1999]




SOLUTION

torque=MB sinθ
torque==(200) (0.25) sin30
torque=25 N-m
Answer: (c)