Notifications
Clear all
0
13/09/2021 11:22 am
Topic starter
A thick current carrying cable of radius 'R' carries current 'I' uniformly distributed across its cross-section. The variation of magnetic field B(r) due to the cable with the distance 'r' from the axis of the cable is represented by :
1 Answer
0
13/09/2021 11:26 am
The answer is (3)
Explanation:
Inside a current-carrying cylindrical conductor.
B = \frac{\mu_0I}{2\pi R^2}r
∴ B ∝ r
Outside the conductor, B
= \frac{\mu_0I}{2\pi r}
∴ B ∝ \frac{1}{r}