A small heating element, connected to 10V d.c. supply draws a current of 5 A. How much electric energy is supplied to heater?

A coil when connected across a 10 V d.c. supply draws a current of 2 A. When it is connected across 10 V - 50 hz a.c. supply the same coil draws a current of 1 A. Explain why? Hence determine self inductance of the coil.

There is an ideal inductor which when connected to 100 V - 50 Hz supply draws a current of 8A. There is an ideal resistor which when connected to 100 V - 50 Hz supply draws a current of 10 A . What current will flow in the circuit when the above described inductor and resistor are connected in series to a supply of 100 V -40 Hz ?

An electric kettle connected to the 230V mains supply draws a current of 10 A. Calculate: (a) the power of the kettle. (b) the energy transferred in 1 minute.

An electric motor operating on a 50 V dc supply draws a current of 12 A . If the efficiency of the motor is 30 % ,estimate the resistance of the windings of the motor.

An electric motor operating on a 50V d.e. supply draws a current of 12A. If the efficiency of the motor is 30\%, estimate the resistance of the windings of the motor.

A 16 pF capacitor is connected to 70 V supply. The amount of electric energy stored in the capacitor is

An electric motor operates on a 50V d.c. supply draw a current of 15 A . If the motor yields a mechanical power of 150 W estimate the power dissipated across its windings. Also find the efficiency of the motor ?

An electric motor operating on a 60 V dc supply draws a currrent of 10A . If the effeciency of the motor is 50% , the resistance of its winding is

An electric motor operator on 15 V supply, draws a current of 5 A and yields mechanical power of 60 W . The energy lost as heat in one hour (in kJ) is.