Magnetic Effects Of Current Question 160
Question: A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field $ \overrightarrow{B} $ , such that $ \overrightarrow{B} $ is perpendicular to the plane of the loop. The magnetic force acting on the loop is [BIT 1992; MP PET 1994; IIT 1983; MP PMT 1999; AMU (Engg.) 2000]
Options:
A) $ ir\overrightarrow{B} $
B) $ 2\pi ri\overrightarrow{B} $
C) Zero
D) $ \pi ri\overrightarrow{B} $
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Answer:
Correct Answer: C
Solution:
Net force on a current carrying closed loop is always zero, if it is placed in an uniform magnetic field.
BETA
