Home
Class 12
PHYSICS
The specific resistance and area of cros...

The specific resistance and area of cross section of the potentiometer wire are `rho'` and `A` respectively. If a current `i` passes through the wire, its potential gradient will be

A

`(I rho)/(A)`

B

`(I)/(A rho)`

C

`(I A)/(rho)`

D

`I A rho`

Text Solution

Verified by Experts

The correct Answer is:
A
`(V)/(I) = (IR)/(I) = (Irho L)/(AL) = (I rho)/(A)`
Promotional Banner

Similar Questions

Explore conceptually related problems

The specific resistance per unit area of cross section of a wire is equivalent to –

The current in the primary circuit of a potentiometer is 0.2 A . The specific resistance and cross-section of the potentiometer wire are 4xx10^(-7) ohm meter and 8xx10^(-7)m^(2) respectively. The potential gradient will be equal to -

As is the cross sectional area and rho is the specific resistance of a potentiometer wire. If I is the current passing through the potentiometer wire, then the potential gradient along the length of the wire is given by

If the resistivity of a potentiometer wire be rho and area of cross-section be A , then what will be potential gradient along the wire

The specific resistance of a potentiometer wire is 10^(-7) Omega m and the cross sectional area of the wire is 10^(-6)m^(2) . If a current of 0.1 A flows through the wire, then the potential gradient will be

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-metre and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)" m"^(2) . The potential gradient along the potentiometer wire is

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-meter and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)m^(2) . The potential gradient along the potentiometer wire is

Resistivity of potentiometer wire is 10^(-7) ohm metre and its area of cross-section is 10^(-6)m^2 . When a current l=0.1A flows through the wire, its potential gradient is: