The energy consumed in a $1\, kW$ electric heater in $30$ seconds will be:

The power rating of an electric motor which draws a current of $3.75\, A$ when operated at $200\, V$ is about:

$A$ heater draws a current of $2\,A$ when connected to a $250\,V$ source. The rate of energy dissipation is ............. $W$.

When a current flows through a conductor,its temperature:

Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current?

In an electric heater, $4\, A$ current passes for $1\, \text{minute}$ at a potential difference of $250\, V$. The power of the heater and the energy consumed will be, respectively: