The equivalent resistance between points $A$ and $B$ in the following electric circuit is:

Which physical quantity has a unit of $kWh$?

The equivalent resistance between points $A$ and $B$ of the following electric circuit will be $.........$

State with the help of a circuit diagram an activity to find the resistance $R$ of a given wire. $A$ current of $0.2 \, A$ passes through a resistor of $20 \, \Omega$. Find the potential difference across its ends.

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.

What is the commercial unit of electrical energy? Represent it in terms of joules.