A coil of resistance `400Omega` is placed in a magnetic field. If the magnetic flux `phi` (wb)
Channel: Doubtnut
Date: 2020-01-19

A coil of resistance `400Omega` is placed in a magnetic field. If the magnetic flux `phi` (wb) linked with the coil varies with time `t` (sec) as `f=50t^(2)+4`, the current in the coil at `t=2` sec is