The torque required to hold a small circular coil of 10 turns, area 1 {\mm}^2 and carrying a current of (\frac{21}{44}) {\A} in the middle of a long solenoid of 10^3 {\turns} \/ {\m} carrying a current of 2.5 {\A}, with its axis perpendicular to the axis of the solenoid is ..........................

Correct Answer is : 1.5×10−8N−m

KCET 2011 Physics Solved Paper

Question : 39 of 60

Marks: +1, -0

The torque required to hold a small circular coil of 10 turns, area 1mm2 and carrying a current of (‌

)A in the middle of a long solenoid of 103‌turns∕m carrying a current of 2.5A, with its axis perpendicular to the axis of the solenoid is ..........................

1.5×10−6N−m
1.5×10−8N−m
1.5×10+6N−m
1.5×10+8N−m

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