Fig. 7.1 shows a lamp in series with four 1.5 V cells and an ammeter, while a voltmeter is connected across the lamp.
(a)[1]
Determine the total potential difference across the four cells.
(b(i))[3]
Calculate the lamp's resistance.
(b(ii))[3]
Calculate the energy transferred by the lamp during 140 s.
(c)[1]
On Fig. 7.1, draw a second lamp so that the ammeter shows a bigger current when the second lamp is connected.
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