The current in a coil varies with respect to time t as `I=3t^(2)+2t`. If the inductance of coil be 10 mH, the value of induced e.m.f. at` t=2s`will be-

The current in a coil at time t is I = t^2e^(-t) . The self inductance of the coil is L= 2mH . How much time it will take to e.m.f. be zero?

The magnetic flux linked with a coil varies with time as phi=3t^(2)+4t+9 webers. The induced emf at t=2s is

The magnetic flux (in weber) linked with a coil of resistance 10Omega is varying with respect to time t as phi=4t^(2)+2t+1 . Then the current in the coil at time t=1 second is

Current (i) passing through a coil varies with time t as i=2t^(2) . At 1 s total flux passing through the coil is 10 Wb. Then

Current (i) passing through a coil varies with time t as i=2t^(2) . At 1 s total flux passing through the coil is 10 Wb. Then

The magnetic flux linked with a coil, in webers is given by the equation phi= 3t^(2)+4t +9 . Then, the magnitude of induced emf at t = 2s will be: