What are the factors on which heat dissipated by a conductor depends?

List in a tabular form two differences between a voltmeter and an ammeter.

What are the resistors used in devices like radios and televisions made of?

Draw a circuit diagram of an electric circuit containing a cell,a key,an ammeter,a resistor of $2\,\Omega$ in series with a combination of two resistors ($4\,\Omega$ each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the $2\,\Omega$ resistor be the same as that across the parallel combination of $4\,\Omega$ resistors? Give reason.

Name the device/instrument used to measure potential difference. How is it connected in an electric circuit?

Find the resistance of a bulb rated as $100 \, W - 250 \, V$.