Find the resistance of a bulb rated as $100 \, W - 250 \, V$.

$A$ child has drawn the electric circuit to study Ohm's law as shown in the figure. His teacher told him that the circuit diagram needs correction. Study the circuit diagram and identify the errors,then describe the correct circuit configuration.

The voltage-current variation of two metallic wires $X$ and $Y$ at constant temperature are shown below. Assuming that the wires have the same length and the same diameter, explain which of the two wires will have larger resistivity.

The $SI$ unit of electric charge is $.........$

What can be the difference between the specific resistance for a thin and thick wire made of the same material?

How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?