Current, Potential Difference and Resistance Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Electric current is defined as the rate of flow of charge. If a charge of 240 C flows through a circuit in 60 seconds, what is the current?
- A. 4 A
- B. 14400 A
- C. 0.25 A
- D. 300 A
2. Which of the following correctly defines potential difference?
- A. The total amount of charge flowing in a circuit
- B. The energy transferred per unit charge between two points
- C. The opposition to the flow of electric charge
- D. The rate at which charge flows through a conductor
3. A device transfers 480 J of electrical energy to 12 C of charge passing through it. Calculate the potential difference across the device.
- A. 40 V
- B. 0.025 V
- C. 492 V
- D. 468 V
4. A resistor has a resistance of 15 Ω and a potential difference of 3 V across it. What is the current flowing through the resistor?
- A. 45 A
- B. 0.2 A
- C. 18 A
- D. 5 A
5. At higher temperatures, the resistance of a metal conductor increases. Which statement best explains this in terms of ion vibration?
- A. Ions vibrate more vigorously, increasing collisions with free electrons and impeding their flow
- B. Ions vibrate less, allowing free electrons to flow more easily
- C. Increased temperature reduces the number of free electrons available
- D. Ion vibrations have no effect on electron flow in metals