Question

Consider following coils each of one turn carrying current `I`. The magnitude of the magnetic induction at `X,Y,Z` are `B_(1),B_(2)` and `B_(3)` respectively. Then (assume side of square to be same in each case)

A. `B_(3)gtB_(1)gtB_(2)`
B. `B_(2)gtB_(3)gtB_(1)`
C. `B_(2)gtB_(1)gtB_(3)`
D. `B_(1)gtB_(2)gtB_(3)`

Answer 1

Correct Answer - A
`B_(3)` should be greater than `B_(1)`, because distance of Centre from current is lesser in this case. `B_(2` is obviously least.