An electric heating element consumes 500 W when connected to a 100 V line. If the line voltage becomes 150 V, the power consumed will be -
Equivalent resistance between point C and D in the combination of resistance shown is –
For driving a current of 3 ampere for 5 minutes in an electrical circuit, 900 joule of work is to be done. Find the emf of the source in the circuit.
In the circuit shown in figure the value of R is-