Potential dividers Quiz
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5 questions, one answer each
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1. A 10 kΩ and a 30 kΩ resistor are in series across 12 V. What is the pd across the 10 kΩ resistor?
- A. 3.0 V
- B. 4.0 V
- C. 6.0 V
- D. 9.0 V
2. A potential divider has an LDR in series with a fixed resistor, the output taken across the LDR. What happens to the output as it gets darker?
- A. It decreases
- B. It stays the same
- C. It increases
- D. It becomes zero
3. Which connection gives a pd that can be varied from 0 V to the full supply pd?
- A. One end of the track and the slider in series with the supply
- B. Both ends of the track across the supply, output from slider to one end
- C. Both ends of the track across the supply, output across the whole track
- D. Slider connected to both ends of the supply
4. A 1.0 kΩ load is connected across the 1.0 kΩ output resistor of a divider with a 1.0 kΩ upper resistor. The output pd is...
- A. unchanged at half the supply pd
- B. two thirds of the supply pd
- C. zero
- D. one third of the supply pd
5. An NTC thermistor is the lower resistor of a divider. As the temperature rises the output pd...
- A. rises
- B. falls
- C. stays constant
- D. reaches the supply pd