An electric appliance draws a current of $0.4\, A$ when the voltage is $200\, V$. Calculate the amount of charge flowing through it in one hour.

Draw a labelled circuit diagram showing three resistors $R_{1}, R_{2}$ and $R_{3}$ connected in series with a battery $(E)$,a rheostat $(Rh)$,a plug key $(K)$ and an ammeter $(A)$ using standard circuit symbols. Use this circuit to show that the same current flows through every part of the circuit. List two precautions you would observe while performing the experiment.

The electrical appliance having higher power draws a larger current.

What is the electric charge passing through a cross-sectional area of the conductor per unit time called?

$A$ battery is a source of maintaining a constant potential difference across two ends of a conductor.

State Ohm's law.