Consider the situation shown in figure. The wires P
1Q
1 and P
2Q
2 are made to slide on the rails with the same speed 5 cm s
−1. Find the electric current in the 19 Ω resistor if (a) both the wires move towards right and (b) if P
1Q
1 moves towards left but P
2Q
2 moves towards right.
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