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STD 12 - 3. current electricity — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 3. current electricity4 Marks
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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