K.C.S.E Physics Q & A - MODEL 2003PP1QN32&33

12/7/2020

K.C.S.E Physics Q & A - MODEL 2003PP1QN32&33

Two identical copper coils p and Q are placed close to each other as shown in Figure 17. Coil P is connected to a D>C power supply and coil Q is connected to a galvanometer, G.

Use this information to answer questions 32 and 33.
State and explain what would be observed on the galvanometer immediately the switch S is closed.
State with reason the difference that would be noted in the observation made in question 32 if the number of turns in coils Q were doubled.

ANSWERS

Galvanometer deflects; Changing flux produced in p is linked to Q causing an e.m.f to be induced / by mutual inductance an emf / current is induced in Q.
Maximum deflection of G will be double; flux linkage doubles when the turns are doubled.

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