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material of wre 1S Imuch does the resistance change if the diametelis dodviedA and B of insulated wires are kept close to each other. Coil AQ. 11. Two circular coilsis connected to a galvanometer while conl 53 is connected to a battery through awill you observe in coil A, if (a) current is passed through coil B by pluthe current is stopped by removing the plug from the key? (c) both the coils arthe same direction with the same speed? Explain your answer mentioning thephenomena involved.Or |
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Answer» (a)As the key is closed, the galvanometer needle will deflect for a moment and then return to zero.(b)As the key is removed ,again a momentary deflection (but more) because of the change in magnetic flux linked with the coil is observed in the galvanometer in opposite direction .(c)With the key closed ,if the coil A and B are moved with the same speed in the same direction ,there is no deflection in the galvanometer because there is no change in the magnetic flux linked with the coil a.The phenomenon involved is Electromagnetic induction. |
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