EMF and internal resistance Quiz
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5 questions, one answer each
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1. A cell of emf 6.0 V and internal resistance 1.0 Ω is connected to a 5.0 Ω resistor. What is the terminal pd?
- A. 6.0 V
- B. 5.0 V
- C. 1.0 V
- D. 4.0 V
2. What is the short-circuit current of a 3.0 V cell of internal resistance 0.50 Ω?
- A. 1.5 A
- B. 3.0 A
- C. 6.0 A
- D. 0.17 A
3. The graph of terminal pd against current for a cell is a straight line. What does the gradient represent?
- A. The emf
- B. The internal resistance
- C. The short circuit current
- D. The negative of the internal resistance
4. A cell has an emf of 1.5 V. A current of 0.20 A produces lost volts of 0.10 V. What is the internal resistance?
- A. 0.50 Ω
- B. 0.020 Ω
- C. 2.0 Ω
- D. 7.5 Ω
5. The current drawn from a battery increases. What happens to the terminal pd?
- A. It increases
- B. It stays equal to the emf
- C. It decreases
- D. It becomes the emf plus the lost volts