Question

`abcd` is a square. There is a current `I` in wire `efg` as shown. Choose the correct options.

A. Net magnetic field at a in inwards
B. Net magnetic field at b is zero
C. Net magnetic field at c is outwards
D. Net magnetic field at d is inwards

Answer 1

Correct Answer - A::C::D
a. Point as lies to the right hand side of `ef ` and `fg`.
Hence, both wires prodce inward magnetic field. Hence net magnetic field is inwards.
Same logic can be applied for other points also.