An electric bulb works on the heating effect of current.

You are given three resistors of $10\, \Omega, 10\, \Omega, 20\, \Omega$,a battery of emf $2.5\, V$,a key,an ammeter,and a voltmeter. Draw a circuit diagram showing the correct connections of the given components such that the voltmeter gives a reading of $2.0\, V$.

On which of the following factors does the resistance of a conductor depend?

$1\, mA = \dots A$

What is meant by an electric circuit? Draw a circuit diagram to show an electric circuit comprising a battery of two cells,a resistor,an ammeter,and a plug key when the circuit is closed.

The electric current flowing through any conductor is directly proportional to the electric potential difference across the conductor. Which law is this?