Magnetic Effects Of Current Question 198
Question: A power line lies along the east-west direction and carries a current of 10 ampere. The force per metre due to the earth’s magnetic field of $ {{10}^{-4}},tesla $ is [Roorkee 1992]
Options:
A) $ {{10}^{-5}}N $
B) $ {{10}^{-4}}N $
C) $ {{10}^{-3}}N $
D) $ {{10}^{-2}}N $
Show Answer
Answer:
Correct Answer: C
Solution:
Force on the wire = Bil Force per unit length $ =Bi={{10}^{-4}}\times 10={{10}^{-3}}N $
BETA
