CUET · PHYSICS · PYQ PAPER 2025
The terminal voltage of a cell
- A is always equal to its emf
- B is always less than its emf
- C is always more than its emf
- D may be equal or less than or greater than its emf
Answer & Solution
Correct Answer
(D) may be equal or less than or greater than its emf
Step-by-step Solution
Detailed explanation
Equal to emf \((V=8)\) : When the cell is in an open circuit (no current is flowing) or has zero internal resistance. Less than emf ( \(V< E\) ): When the cell is discharging (supplying current to a circuit). The internal resistance causes a voltage drop: \(V= E -I r\). Greater…
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