MHT CET 2024 Physics question
Two concentric circular coils A and B having radii 20 cm and 10 cm respectively lie in the same plane. The current in coil A is 0.5 A in anticlockwise direction. The current in coil B, so that net magnetic field at the common centre is zero, Is
Answer: (C)
Solution
The field at the centre of a circular coil is . For the net field at the common centre to be zero the two fields must be equal in magnitude and opposite in direction: , so . Coil A
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account