Two electric lamps of $100\, W$ and $25\, W$ respectively are joined in parallel to a supply of $200\, V$. Calculate the total current flowing through the circuit.
Which has a greater resistance$-$a $100$ $W$ bulb or a $60$ $W$ bulb ?
Two students perform the experiments on series and parallel combinations of two given resistors $R_{1}$ and $R_{2}$ and plot the following $V -I$ graphs.
Which of the graphs is (are) correctly labelled in terms of the words 'series' and 'parallel'. Justify your answer.
Define electrostatic potential at a point.
An electric refrigerator rated $400\, W$ operates $8$ hour per day. What is the cost of the energy to operate it for $30$ days at ₹ $3.00$ per $k W h ?$