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If galvanometer and battery are intercha...

If galvanometer and battery are interchanged in balanced wheatstone bridge, then

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true but R is NOT the correct explanation of A

C

A is true but R is false

D

A is false and R is true

Text Solution

Verified by Experts

The correct Answer is:
C
In balanced condition, if the galvanometer and the voltage source are interchanged, the balanced condition remains same since in both the cases `R_(1) R_(4)` remains equal to `R_(2)R_(3)`. The assertion is true.
The balanced condition of Wheatstone bridge depends on the value of the resistances. `R_(1)R_(4)` should be equal to `R_(2)R_(3)`. So, if the resistance values are changed, the balanced condition also gets disturbed. So, the reason is false.
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Figure 6.64 shows a balanced wheatstone bridge.

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