The terminal potential difference of a cell is greater than its emf when:

 1 A battery of less emf is connected in its series. 2 A battery of higher emf is connected in its series. 3 A battery of higher emf is connected in its parallel. 4 A battery of less emf is connected in its parallel.
Subtopic: Â EMF & Terminal Voltage |
From NCERT
AIPMT - 1999
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A car battery of emf $$12~\text{V}$$ and internal resistance $$5\times 10^{-2}~\Omega$$ receives a current of $$60~\text{A}$$ from an external source. The terminal voltage of the battery is:

 1 $$12~\text{V}$$ 2 $$9~\text{V}$$ 3 $$15~\text{V}$$ 4 $$20~\text{V}$$
Subtopic: Â EMF & Terminal Voltage |
Â 51%
From NCERT
AIPMT - 2000
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For a cell, the terminal potential difference is $$2.2$$ V when the circuit is open and reduces to $$1.8$$ V when the cell is connected to the resistance of $$R = 5~\Omega$$. The internal resistance of cell ($$r$$) is:

 1 $$\dfrac{10}{9}~ \Omega$$ 2 $$\dfrac{9}{10}~ \Omega$$ 3 $$\dfrac{11}{9}~ \Omega$$ 4 $$\dfrac{5}{9}~ \Omega$$
Subtopic: Â EMF & Terminal Voltage |
Â 72%
From NCERT
AIPMT - 2002
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A battery is charged at a potential of $$15$$ V for $$8$$ hours when the current flowing is $$10$$ A. The battery on discharge supplies a current of $$5$$ A for $$15$$ hours. The mean terminal voltage during discharges is $$14$$ V. The "Watt hour" efficiency of the battery is:
1. $$80\%$$
2. $$90\%$$
3. $$87.5\%$$
4. $$82.5\%$$

Subtopic: Â EMF & Terminal Voltage |
Â 68%
From NCERT
AIPMT - 2004
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