Question

If the current density inside a straight conductor is uniform over its cross-section, the flux density variation inside the conductor at different distances from its centre is:

• A. Linear
• B. Square of the distance
• C. Inverse of the distance
• D. Exponential

Hint:

For a conductor with uniform current density, the magnetic flux density varies linearly with distance from the center of the conductor.

Answer 1

The Correct Option is A

If the current density inside a conductor is uniform, then according to Ampere's Law, the magnetic flux density (B) varies linearly with distance from the center of the conductor. This is because the magnetic field generated by the current is proportional to the amount of current enclosed by a particular distance from the center, which increases linearly with distance. Thus, the magnetic flux density variation is linear with distance from the center of the conductor.