Question

Two circular coils `P` and `Q` are made from similar wire but radius of `Q` is twice that of `P`. Relation between the values of potential difference across them so that the magnetic induction at their centers may be the same is
A. `V_(q)=2V_(p)`
B. `V_(q)=3V_(p)`
C. `V_(q)=4V_(p)`
D. `V_(q)=1//4V_(p)`

Answer 1

Correct Answer - 3
`B=(mu_(0)i)/(2r)` where `i=(V)/(R)`