Physics (AS & A Level) · May / June 2016 · Paper 42 · Question 11
9702
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A bridge rectifier contains four ideal diodes A, B, C and D, as shown in Fig. 11.1. input 9 $ % & / N ' 1 Fig. 11.1 The output of the rectifier is connected to a load L of resistance 2.4 kΩ.
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11(a)[1]
point P shown at ‘lower end’ of load [1]
11(b)[2]
Vr.m.s. = 6.0 / √2 = 4.24 V Ir.m.s. = 4.24 / (2.4 × 103) = 1.8 × 10–3 A [2]
11(c)(i)[1]
capacitor in parallel with load [1]
11(c)(ii)[3]
line from peak to curve at 3.0 V for either half- or full-wave rectified correct curvature on line (gradient becoming more shallow) line drawn as for full-wave rectified [3]
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