(a) State two uses of capacitors in electrical circuits, other than for the smoothing of direct current.

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(a) Define the ohm. (b) A battery of electromotive force (e.m.f.) E and internal resistance 1.5 Ω is connected to a

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A slice of germanium of cross-sectional area 1.0 cm2 carries a current of 56 μA. The numbe

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A spring is hung vertically from a fixed point. A mass M is hung from the other end of the spring, as illustrated in Fig. 3.1.

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