Magnetic Effects Of Current Question 65

Question: A uniform wire is bent in the form of a circle of radius R. A current I enters at A and leaves at C as shown in the figure : If the length ABC is half of the length ADC, the magnetic field at the centre O will be [MP PMT 1997]

Options:

A) Zero

B) $ \frac{{\mu_{0}}I}{2R} $

C) $ \frac{{\mu_{0}}I}{4R} $

D) $ \frac{{\mu_{0}}I}{6R} $

Show Answer

Answer:

Correct Answer: A

Solution:

See solution 34.