Resistance of a metal wire of length $1\, m$ is $26\, \Omega$ at $20^{\circ} C$. If the diameter of the wire is $0.3\, mm$,what will be the resistivity of the metal at that temperature?

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?

The unit of electric power may also be expressed as:

Two lamps,one rated $100 \, W$ at $220 \, V$ and the other $60 \, W$ at $220 \, V$,are connected in parallel to a $220 \, V$ supply. Find the current drawn from the supply line.

Which electrical appliance with the given rating will draw the maximum current from the source?

The amount of $2 \ A$ electric current is passed for $1 \ minute$ through a conducting wire. How much total electric charge will pass through this wire (in $C$)?