Magnetic Effects Of Current Question 191
Question: A rectangular coil $ 20,cm\times 20,cm $ has 100 turns and carries a current of 1 A. It is placed in a uniform magnetic field B =0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is [MP PMT 1997]
Options:
A) Zero
B) 200 N-m
C) 2 N-m
D) 10 N-m
Show Answer
Answer:
Correct Answer: C
Solution:
$ \tau =NBiA=100\times 0.5\times 1\times 400\times {{10}^{-4}}=2\ N-m $
BETA
