Magnetic Effects Of Current Question 28
Question: A current i ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor of the cable, then the magnetic induction at any point outside the conductor at a distance r metre from the axis is
Options:
A) $ \infty $
B) Zero
C) $ \frac{{\mu_{0}}}{4\pi }\frac{2i}{r} $
D) $ \frac{{\mu_{0}}}{4\pi }\frac{2\pi ,i}{r} $
Show Answer
Answer:
Correct Answer: B
Solution:
The respective figure is shown below. Magnetic field at P due to inner and outer conductors are equal and opposite. Hence net magnetic field at P will be zero.
BETA
