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EMF and EMF Devices

current induc...

Question

current induced in the loop when arm PQ is moved with velocity 20 m/s.

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Solution

This is a slide wire generator and the equivalent circuit is shown in the figure.
Here $P Q = l = 10 c m = 0.1 m$
The induced emf in the loop is $ε = B l v = (0.1) (0.1) (20) = 0.2 V$

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Table 1	Table 2
(a) If current is increased	(p) Induced current in loop is clockwise
(b) If current is decreased	(q) Induced current in loop is anticlockwise
(c) If loop is moved away from the wire	(r) Wire will attract the loop
(d) If loop is moved towards the wire	(s) wire will repel the loop

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