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Consider the meter bridge shown in the f...

Consider the meter bridge shown in the figure below

The resistance `X` has temperature coefficent `alpha_(1)` and known resistance box [`9Omega` shown] has `alpha_(2)`. For shown situation balance point is at `10cm` from left end, if temperature of system increases by `DeltaT` due to joule heating, then the shift in the balance point is (Assume that only the resistance of `X` and resistance box changes
due to change in temperature and there is no other effect).

A

`9(alpha_(1)-alpha_(2))DeltaT`

B

`9(alpha_(1)+alpha_(2))DeltaT`

C

`(1)/(9)(alpha_(1)+alpha_(2))DeltaT`

D

`(1)/(9)(alpha_(1)alpha_(2))DeltaT`

Text Solution

Verified by Experts

The correct Answer is:
A
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