20.5b Ex1 ON05 P4 Q6 Coil's Induced emf Graphs | A2 Magnetic Induction | CAIE A Level 9702 Physics

Example 1 - 9702/4/O/N/05: (b) A flat coil consists of N turns of wire and has area A. The coil is placed so that its plane is at an angle θ to a uniform magnetic field of flux density B, as shown in Fig. 6.1. Using the symbols A, B, Nand θ and making reference to the magnetic flux in the coil, derive an expression for the magnetic flux linkage through the coil.
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(c) (i) State Faraday’s law of electromagnetic induction. (ii)The magnetic flux density Bin the coil is now made to vary with time t as shown in Fig. 6.2. On Fig. 6.3, sketch the variation with time to f the e.m.f. E induced in the coil.

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