The rate change of flux change inside on core of self inductance 0.5 H, is `20A//S`. What is the amount,of induced emf in the circuit?

The emf E of a source varies with time. It sends a current I through a coil of self-inductance L connected to it. What is the instantaneous effective emf of the circuit?

The current I through a closed coil of self-inductance 0.25 H is related with time t as I=4t-t^(2) . Then the emf e induced in the coil will vary with time in the manner shown in the justify.

A 220V, 50Hz ac source is connected to an inductance of 0.2H and a resistance of 20Omega in series . What is the current in the circuit?

An alternating emf of E=20sin 1000tV is applied on a circuit containing a pure resistance of 25Omega in series with a coil of self-inductance 40 mH and resistance 15Omega . Find out the power factor of the circuit , Also , find out this capacitance of a capacitor that should be connected in series to raise the power factory to unity.

If a rate of change of current of 2 A.s^(-1) induces an emf of 10 mV in a solenoid, what is the self-inductance of the solenoid?

A battery of emf 10V and internal resistance 3 ohm is connected to a resistor. If the current in the circuit is 0.5A, what is the resistance of resistance of resistor ? What is the terminal voltage of the battery when the circuit is closed?

A boat is moving due east in a region where the earth's magnetic field is 5.0xx10^(-5)N.A^(-1).m^(-1) due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is 1.50 m. s^(-1) , the magnitude of the induced emf in the wire of aerial is

The magnetic flux (phi) (in Wb) linked with a 100 Omega coil changes with time t (in s) according to the relation phi=8t^(2)-2t+1 . What is the value of induced current (in A) in the coil at t = 2 s?

An alternating emf of E=20sin 1000tV is applied on a circuit containing a pure resistance of 25Omega in series with a coil of self-inductance 40 mH and resistance 15Omega . Find out the phase difference between E and the current I.