A-LevelPhysicsElectric fields9702/12 · May/June 2014 · Q121 Mark
A tiny oil droplet with mass 6.9 × 10⁻¹³ kg is at rest in an electric field of electric field strength 2.1 × 10⁷ N C⁻¹, as shown. [Figure 12.1] The weight of the droplet is exactly balanced by the electrical force on the droplet. What is the charge on the droplet?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A3.3 × 10⁻²⁰ C
B-3.3 × 10⁻²⁰ C
C3.2 × 10⁻¹⁹ C
D-3.2 × 10⁻¹⁹ C
✓ Correct answer
D: -3.2 × 10⁻¹⁹ C
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Electric fields and see which topics are most likely to come up next.
Sign up free →