Define electrostatic potential at a point.

$n$ equal resistors are first connected in series and then connected in parallel. The ratio of the maximum to the minimum resistance is

If the cross-sectional area of a conducting wire is doubled,what will be the effect on its resistance?

Derive an expression for equivalent resistance when three resistors of resistance $R_{1}, R_{2}$ and $R_{3}$ are connected in parallel.

An electric kettle consumes $1\, kW$ of electric power when operated at $220\, V$. $A$ fuse wire of what rating (in $A$) must be used for it?

Three resistors of $5 \, \Omega$,$10 \, \Omega$,and $15 \, \Omega$ are connected in series,and the combination is connected to a battery of $30 \, V$. An ammeter and a voltmeter are connected in the circuit. Draw a circuit diagram to connect all the devices in the correct order. What is the current flowing through the circuit and the potential difference across the $10 \, \Omega$ resistor?