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Meter Bridge

102.A meter b...

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102.A meter bridge is set up as shown to determine an unknown resistance X using a standard 10 ohm resistor. The galvanometer shows null point when trapping key is at 52 cm mark. The end corrections are 1 and 2 cm respectively for the ends A and B . The determined value of X is

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Q. A meter bridge is set-up as shown, to determine an unknown resistance

X

using a standard

10 o h m

resistor. The galvanometer shows null point when tapping-key is at

52 c m

mark. The end-corrections are

1 c m

2 c m

respectively for the ends

A

B

. The determined value of

^{'} X^{'}

Q. A meter bridge is set-up as shown, to determine an unknown resistance

X

using a standard resistor of 10

Ω

. The galvanometer shows null point when tapping-key is at 52

c m

mark. The end-corrections are 1

c m

c m

respectively for the ends A and B. Then the determined value of

X

Q. A meter bridge setup as shown below is used to determine an unknown resistance

X

using a standard

21 Ω

resistor. If null point is at

40 cm

A

, and end correction at

A, B

2.0 cm

each, find value of

X

Q. An unknown resistance is placed in the left gap and resistance of

50

ohm is placed in the right gap of a meter bridge. The null point is obtained at

40

cm from the left end. Determine the unknown resistance.

Q. (a) In a metre bridge [Fig.], 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 Wheat stone 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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