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FAQs on Electrostatic Potential and Capacitance: JEE Main Previous Year Questions (2021-2025) - Physics for JEE Main & Advanced

1. What is the formula for calculating the electrostatic potential due to a point charge?
Ans. The formula for calculating the electrostatic potential due to a point charge is V = kq/r, where V is the electrostatic potential, k is the electrostatic constant, q is the charge, and r is the distance from the point charge.
2. How can we determine the electric potential energy stored in a capacitor?
Ans. The electric potential energy stored in a capacitor can be determined using the formula U = 1/2 * Q^2 / C, where U is the electric potential energy, Q is the charge on the capacitor, and C is the capacitance of the capacitor.
3. What is the relationship between electric potential and electric field strength?
Ans. The relationship between electric potential and electric field strength is given by the formula E = -dV/dr, where E is the electric field strength, V is the electric potential, and r is the distance from the source of the electric field.
4. How does the capacitance of a parallel plate capacitor change when the distance between the plates is increased?
Ans. The capacitance of a parallel plate capacitor increases when the distance between the plates is increased. This is because capacitance is directly proportional to the area of the plates and inversely proportional to the distance between the plates.
5. Can the electrostatic potential at a point be negative?
Ans. Yes, the electrostatic potential at a point can be negative. This indicates that work must be done by an external force to bring a positive test charge from infinity to that point, against the electric field.
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