If there is a frictional force between two surfaces, then which of the following will be created?
Correct answer: B. Charge
- A. Electric field
- B. Charge
- C. Magnetic field
- D. All of these
Explanation
Friction between two surfaces causes charge separation as electrons are transferred from one material to another. This results in one surface becoming positively charged and the other negatively charged, thus creating an electric field between them. The process does not involve the creation of new charges, as they are simply redistributed from one surface to the other. Option A is incorrect because while friction creates charge, it does not directly create an electric field in the traditional sense. Option C is incorrect because there is no direct relationship between friction and the generation of a magnetic field. Option D is also incorrect since it includes the creation of a magnetic field, which does not occur due to friction.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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