In a potentiometer arrangement. E_1 is the cell establishing curr… - Vidyadip

MCQ

In a potentiometer arrangement. $E_1$ is the cell establishing current in primary circuit. $E_2$ is the cell to be measured. $AB$ is the potentiometer wire and $G$ is a galvanometer. Which of the following are the essential condition for balance to be obtained.

A
The $\mathrm{emf}$ of $E_1$ must be greater than the $\mathrm{emf}$ of $E_2.$
B
Either the positive terminals of both $E_1$ and $E_2$ or the negative terminals of both $E_1$ and $E_2$ must be joined to one end of potentiometer wire.
C
The positive terminals of $E_1$ and $E_2$ must be joined to one end of potentiometer wire.
✓
Both $(A)$ and $(B)$

✓

Answer

Correct option: D.

Both $(A)$ and $(B)$

d

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