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In the given potentiometer circuit lengt...

In the given potentiometer circuit length of the wire `AB` is `3 m` and resistance is `R = 4.5 Omega`. The length `AC` for no deflection in galvanometer is

A

`2 m`

B

`1.8 m`

C

dependent on `r_(1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
(c ) Potential gradient
`x = ((5)/(0.5 + 4.5)) ((4.5)/(3)) = 1.5 Vm^(-1)`
Here `(x) (AC) = 3 implies AC = (3)/(1.5) = 2 m`
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