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In the potential circuit shown, the leng...

In the potential circuit shown, the length of potential wire AB is 400cm long and resistance per unit length is `0.2Omega//cm`. If a battery of e.m.f.E and internal resistance r is connected across XY as shown. Then for given circuit if key is closed.

A

`E=2V,r=16Omega` balanced point would not exist on potential wire

B

E=1V, and `r = 25 Omega`, balanced point is at 250 cm from A

C

We can not compare e.m.f.'s of two batteries which are greater than 1.6 volt using this potentiometer

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
Potential gradient `=(4xx10^(-3))` volt/cm
Maximum readable voltage = 1.6 volt.
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