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  • A potentiometer is connected across A and B and a balance is obtained at 64cm. When potentiometer lead to B is moved to c a balance is found at 8cm. If the potentiometer is now connected across B a

A potentiometer is connected across A and B and a balance is obtained at 64cm. When potentiometer lead to B is moved to c a balance is found at 8cm. If the potentiometer is now connected across B and C, a balance wil be found at (in cm) 

Option: 1

56


Option: 2

8


Option: 3

64


Option: 4

72


Answers (1)

best_answer

As we learnt

 

Potentiometer -

 

It is a device used to measure e.m.f of a given cell and to compare e.m.f's of cells

- wherein

It is also used to measure internal resistance of given cell

 

 E_1\: \alpha \: 64

E_1-E_2\: \alpha\: 8

E_2\alpha \: l

\therefore 64-l=8\Rightarrow l=56cm

 

Posted by

Divya Prakash Singh

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