Calculate the current flowing through a heater rated at `2 kW` when connected to a `300V` d.c. supply.

Calculate the current flowing through a heater rated at 2kW when connected to a 300V d.c. supply.

How much is the current flowing through a heater rated at 2kW when connected to a 100 V d.c. supply?

Calculate the current flows through resistance 2Omega .

A heater A gives out 300 W of heat when connected to a 200 V d.c supply . A second heater B gives out 600 W when connected to a 200 v.d.c. supply . If a series combination of the two heaters is connected to a 200 V d.c. supply the heat output will be

Calculate the current through the resistace connected across MN and the current supplied by each of the batteries in the circuit diagram shown in

A current of 6A flows through a coil when connected to a 24 volt d.c. supply. To get the same current with a 50 Hz a.c. supply, the voltage required is 30 V. What is the power factor of the coil?

An electric room heater draws a current of 2.4A from the 120V supply line. What current will his room heater draw when connected to 240V supply line?

A current of 5 A flows through a conductor 25 ^@C , when connected to a power supply of 100 V . At what temperature the current will drop to 2A , if it remains connected to the power supply (Temperature coefficient of conductor is 0.005 ^@C^(-1) .)

A bulb is connected to a 100 V DC supply . It is found that the current of 5 A flows in the circuit. The same bulb is connected to an AC supply at 120 V . The frequency of source is 50 Hz. Calculate the inductance of coil required so that the lamp glows in an AC circuit too.