Electric potential and field patterns Quiz
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5 questions, one answer each
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1. What is the field strength between plates 2.0 cm apart with a p.d. of 500 V?
- A. 1.0 × 10⁴ V m⁻¹
- B. 2.5 × 10⁴ V m⁻¹
- C. 25 V m⁻¹
- D. 250 V m⁻¹
2. The potential at a distance r from a point charge is 120 V. What is the potential at 3r?
- A. 13 V
- B. 360 V
- C. 1080 V
- D. 40 V
3. Which statement about equipotentials is correct?
- A. They are parallel to field lines
- B. They are closest where the field is weakest
- C. No work is done moving a charge along one
- D. They only exist in radial fields
4. What is the work done moving a 5.0 nC charge through a p.d. of 200 V?
- A. 1.0 × 10⁻⁶ J
- B. 2.5 × 10⁻¹¹ J
- C. 4.0 × 10¹⁰ J
- D. 1.0 × 10⁻³ J
5. In which direction does the electric field point relative to the potential?
- A. In the direction of increasing potential
- B. In the direction of decreasing potential
- C. Along an equipotential
- D. It has no direction relative to the potential