A-level Physics · Electric fields

Coulomb's law

Use F = Q₁Q₂/4πε₀r² for point charges in nC or μC, charges in a nucleus, or the separation.

0 correct out of 0Streak: 0

Question 1

Two small spheres carry point charges of +40.5 nC and +48.5 nC. Their centres are 7.6 cm apart in air. Calculate the magnitude of the electrostatic force between them. Use ε₀ = 8.85×10−128.85 \times 10^{-12} F m⁻¹. Give your answer to 3 significant figures.

N

You can type 4.53, 3.2e-5, 3.2 × 10^-5 or 7/3.

Your progress is kept on this device only. Nothing you type is sent to us.

Stop spending Sunday on Monday's lesson.

Free to start, no card. Your first lesson is about two minutes away.

Start free