Question

If the length of potentiometer wire is increased by keeping constant potential difference across the wire then​

Answer 1

Answer:

If the length of a potentiometer wire is increased by keeping constant potential difference across the wire,then

Explanation:

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Answer 2

The null point is obtained at larger distance.

Explanation:

The complete question is,

If the length of a potentiometer wire is increased by keeping  constant potential difference across the wire, then

(a) null point is obtained at larger distance

(b) there is no change in the null point

(C) potential gradient is increased

(d) null point is obtained at shorter distance​

If the length of a potentiometer wire is increased by keeping  constant potential difference across the wire, then

• Disturbance is created in the null point.
• Potential gradient is equal to the ratio between Potential difference and Length of the wire.

           $\text {Potential gradient} = {\frac{\text { Potential difference }}{\text { Length of the wire }}$                 

             $\text {Potential Difference} = \frac{V}{L}$                      

• Potential difference is directly proportional to the potential gradient
• Length of the wire are inversely proportional to the potential gradient

• So the potential gradient decreases when the length of the wire increases.

• Therefore the null point  will be at longer distance when the length of a potentiometer wire is increased by keeping  constant potential difference across the wire.

To Learn More ...

1) The potential gradient between the two charged plates having separation, of 0.5 cm and potential difference of 12 volts is :-

brainly.in/question/5510499

2) Why the potential gradient decreases with increase in resistance?

brainly.in/question/3970633