Physics (AS & A Level) · May / June 2016 · Paper 42 · Question 10
9702
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Two coils P and Q are placed close to one another, as shown in Fig. 10.1. power supply coil P coil Q V Fig. 10.1
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10(a)[2]
iron rod changes flux (density)/field change of flux in coil Q causes induced e.m.f. [2]
10(b)[4]
constant reading (either polarity) from time zero to near t1 spike in one direction near t1 clearly showing a larger voltage of opposite polarity zero reading from near t1 to t2 [4]
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