work done in two speheres made of same substance have diameter s in the ratio of 1:2 their thermal capacity are in ratio of
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Potential difference is the work done per unit charge. A potential difference of 1 V means that 1 joule of work is done per coulomb of charge. ( 1 V = 1 J C-1) Potential difference in a circuit is measured using a voltmeter which is placed in parallel with the component of interest in the circuit.
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