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Summary: Electrostatic Potential & Capacitance Video Lecture | Physics for JAMB

FAQs on Summary: Electrostatic Potential & Capacitance Video Lecture - Physics for JAMB

1. What is electrostatic potential?

Ans. Electrostatic potential is the amount of work done in bringing a positive unit charge from infinity to a particular point in an electric field. It represents the potential energy of a charge at that point.

2. How is electrostatic potential different from electric potential energy?

Ans. Electrostatic potential is a scalar quantity that represents the potential energy per unit charge at a specific point in an electric field. Electric potential energy, on the other hand, is the potential energy stored in a system of charged objects due to their positions and configuration.

3. How is the electrostatic potential related to the capacitance of a capacitor?

Ans. The electrostatic potential difference between the two plates of a capacitor is directly proportional to the charge stored on the plates and inversely proportional to the capacitance of the capacitor. Mathematically, the potential difference (V) is equal to the charge (Q) divided by the capacitance (C): V = Q/C.

4. What is the formula for calculating the electric potential due to a point charge?

Ans. The formula for calculating the electric potential (V) due to a point charge (Q) at a distance (r) from the charge is given by V = kQ/r, where k is the electrostatic constant (8.99 x 10^9 Nm^2/C^2). This formula represents the potential energy per unit charge at a certain distance from the point charge.

5. How does the electrostatic potential vary around a uniformly charged sphere?

Ans. Around a uniformly charged sphere, the electrostatic potential varies inversely with the distance from the center of the sphere. As the distance increases, the potential decreases. This relationship holds true both inside and outside the sphere, as long as the charge is uniformly distributed.

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