Two point charges are sperated by a distance of 4m. The force between them is 4N. What is the force between the charges, When the distance between them is 1m?
Correct answer: B. 64N
- A. 16N
- B. 64N
- C. 1N
- D. 32N
Explanation
Explanation is as follows: KQ1Q2/ r^2 = force on charges K*Q1*Q2/ 4^2= 4 KQ1Q2= 64 ------> equation : 1 now for distance = 1m force = K*Q1*Q2 / 1^2= K*Q1 * Q2 = 64 ( FROM EQUATION 1)
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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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