Coulomb’s law (AQA A-Level Physics): Quizzes

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Coulomb’s law
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According to Coulomb's Law, how is force related to the product of charges?

Directly proportional

How is force related to distance in Coulomb's Law?

Inversely proportional to r2r^2

What does ε0\varepsilon_0 represent in Coulomb's Law?

Permittivity of free space

What does rr represent in the formula F=14πε0Q1Q2r2F = \frac{1}{4\pi \varepsilon_0} \frac{Q_1 Q_2}{r^2}?

Distance between centres of charges

What can be approximated as a vacuum for Coulomb's Law calculations?

Air

For a spherical charge, where does the charge act from?

Centre of the sphere

What type of force exists between two charges of the same sign?

Repulsive

What type of force exists between charges with opposite signs?

Attractive

How does electrostatic force compare to gravitational force between subatomic particles?

Much stronger

What is the ratio of electrostatic to gravitational force between two protons at 2 pm apart?

1.24×10361.24 \times 10^{36}

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