Current, Potential Difference & Resistance Quiz
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5 questions, one answer each
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1. What is electric current?
- A. The energy transferred per unit charge
- B. The rate of flow of electric charge
- C. The opposition to the flow of charge
- D. The total charge stored in a battery
2. A current of 4 A flows through a component for 20 s. How much charge passes?
- A. 5 C
- B. 16 C
- C. 24 C
- D. 80 C
3. How should a voltmeter be connected to measure the potential difference across a resistor?
- A. In series with the resistor
- B. In parallel with the resistor
- C. In series with the ammeter only
- D. It should replace the resistor
4. A circuit has a potential difference of 12 V and a current of 3 A through a resistor. What is the resistance?
- A. 4 Ω
- B. 9 Ω
- C. 15 Ω
- D. 36 Ω
5. Two identical resistors are connected first in series, then in parallel, across the same supply. How does the total resistance compare?
- A. Total resistance is the same in both cases
- B. Total resistance is greater in series than in parallel
- C. Total resistance is greater in parallel than in series
- D. Total resistance cannot be determined