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Question

Physics Question on Magnetic Field due to a Current Element

Two concentric circular coil of radius 20 cm and 30 cm carries current 2A and 3A respectively in opposite direction then magnetic field at centre will be :-

A

4π × 10-7

B

2π × 10-7

C

2 × 10-7

D

Zero

Answer

Zero

Explanation

Solution

The correct option is (D): Zero.