1.

A condenser is charged using a constant current. The ratio of the magnetic field at a distance of `(R )/(2)` and `R` from the axis of condenser (`R` is the radius of plate) while charging isA. `1:1`B. `2:1`C. `1:2`D. `1:4`

Answer» Correct Answer - C
`r lt RB=(mu_(0)I_(0)r)/(2piR^(2))`, `r=R B=(mu_(0)I_(d))/(2piR )`


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