1.

(a) In a metre bridge [Fig. 3.27], the balance point isfound to be at 39.5 cm from the end A,when the resistor Y isof 12.5 Ω. Determine theresistance of X.Why are the connections between resistors in a Wheatstone or meterbridge made of thick copper strips?(b) Determinethe balance point of the bridge above if Xand Y areinterchanged.(c) What happens if the galvanometer and cell areinterchanged at the balance point of the bridge? Would thegalvanometer show any current?

Answer»


(a) In a metre bridge [Fig. 3.27], the balance point is
found to be at 39.5 cm from the end A,
when the resistor Y is
of 12.5 Ω. Determine the
resistance of X.
Why are the connections between resistors in a Wheatstone or meter
bridge made of thick copper strips?


(b) Determine
the balance point of the bridge above if X
and Y are
interchanged.



(c) What happens if the galvanometer and cell are
interchanged at the balance point of the bridge? Would the
galvanometer show any current?


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