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If two charges of +3 µC and -3 µC are placed 0.2 m apart, what is the magnitude

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Question: If two charges of +3 µC and -3 µC are placed 0.2 m apart, what is the magnitude of the force between them?

Options:

  1. 67.5 N
  2. 45 N
  3. 30 N
  4. 15 N

Correct Answer: 45 N

Solution: 

Using Coulomb\'s law, F = k * |q1 * q2| / r^2 = (8.99 x 10^9 N m²/C²) * |3 x 10^-6 C * -3 x 10^-6 C| / (0.2 m)^2 = 45 N.

If two charges of +3 µC and -3 µC are placed 0.2 m apart, what is the magnitude

Practice Questions

Q1
If two charges of +3 µC and -3 µC are placed 0.2 m apart, what is the magnitude of the force between them?
  1. 67.5 N
  2. 45 N
  3. 30 N
  4. 15 N

Questions & Step-by-Step Solutions

If two charges of +3 µC and -3 µC are placed 0.2 m apart, what is the magnitude of the force between them?
  • Coulomb's Law – Coulomb's law describes the electrostatic force between two charged objects, which is proportional to the product of their charges and inversely proportional to the square of the distance between them.
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