In a circuit, a 3V cell, a small lamp of resistance 1.5Ω, and a voltmeter have been connected in such a way that the lamp and the voltmeter are in series.
After the switch is closed, the lamp does not glow as expected.
(a) Identify the mistake in the circuit connection.
(b) Describe how the voltmeter should be re-connected to measure the potential difference across the lamp correctly.
(c) State what will happen to the brightness of the lamp after the correction and give a brief reason.