(a) In a meter bridge [Fig. 3.27], the balance point is found to be at39.5 cm from the end A, when the resistor Y is of 12.5 W.Determine the resistance of X. Why are the connections betweenresistors in a Wheatstone or meter bridge made of thick copperstrips? (b) Determine the balance point of the bridge above if X and Y areinterchanged.(c) What happens if the galvanometer and cell are interchanged atthe balance point of the bridge? Would the galvanometer showany current?

(a) In a meter bridge [Fig. 3.27], the balance point is found to be at

1.	(a) In a meter bridge [Fig. 3.27], the balance point is found to be at39.5 cm from the end A, when the resistor Y is of 12.5 W.Determine the resistance of X. Why are the connections betweenresistors in a Wheatstone or meter bridge made of thick copperstrips? (b) Determine the balance point of the bridge above if X and Y areinterchanged.(c) What happens if the galvanometer and cell are interchanged atthe balance point of the bridge? Would the galvanometer showany current?
Answer» (a) In a meter bridge [Fig. 3.27], the balance point is found to be at39.5 cm from the end A, when the resistor Y is of 12.5 W.Determine the resistance of X. Why are the connections betweenresistors in a Wheatstone or meter bridge made of thick copperstrips? (b) Determine the balance point of the bridge above if X and Y areinterchanged.(c) What happens if the galvanometer and cell are interchanged atthe balance point of the bridge? Would the galvanometer showany current?

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