CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

The specific resistance and cross-section area of potentiometer wire is $$\rho$$ and $$A$$ respectively. If a current $$I$$ is passed through the wire, the potential gradient of the wire will be :


A
IρA
loader
B
IρA
loader
C
IAρ
loader
D
IAρ
loader

Solution

The correct option is D $$\displaystyle \dfrac{I\rho}{A}$$
Potential gradient $$=$$ potential difference per unit length.

So,$$ k=\dfrac{V}{l}=\dfrac{IR}{l}=\dfrac{I(\rho l/A)}{l}=\dfrac{I\rho}{A}$$


Physics

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
People also searched for
View More



footer-image