The force between the poles of two magnets and the force between two charges are alike in that both
- A. obey an inverse square law
- B. act only over a few millimetres
- C. are always attractive
- D. require a material medium
Explanation
Both fall off as one over the square of the separation and both can be attractive or repulsive depending on the sign or polarity involved. The essential difference is that an isolated magnetic pole has never been found, whereas an isolated electric charge is ordinary. Cutting a magnet in half simply produces two smaller magnets, each with both poles.
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