$A$ $10\, \Omega$ electric heater operates on a $110\, V$ line. Calculate the rate at which it develops heat in $watts$.

The maximum current that flows through a fuse wire before it blows out varies with its radius as

Electric power is transmitted over long distances through conducting wires at high voltage because

The emf of a storage battery of a car is $6.0 \ V$. If the internal resistance of the battery is $0.2 \ \Omega$,then the maximum power drawn from the battery is . . . . . . $W$.

Which of the following curves represents the relationship between the heat produced in a resistor and the current flowing through it?

Water in an electric kettle starts boiling in $15 \ min$ after being switched on. If the length of the heating wire is reduced to $2/3$ of its original length,the time taken to boil the same amount of water will be ........... $min$.