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Index: Electrostatic Potential & Capacitance | Physics for Grade 12 PDF Download

1. Electrostatic Potential

2. Potential due to a Point Charge

3. Potential due to an Electric Dipole

4. Potential due to a System of Charges

5. Equipotential Surfaces

6. Potential Energy of a System of Charges

7. Potential Energy in an External field

8. Electrostatics of Conductors

9. Dielectrics & Polarisation

10. Capacitors & Capacitance

11. The Parallel Plate Capacitor

12. Effect of Dielectric on Capacitance

13. Combination of Capacitors

14. Energy Stored in a Capacitor

15. General

16. NCERT Textbook and Solutions

17. Previous Year Tests

18. Tests of the Chapter: Electrostatic Potential & Capacitance

19. H.C. Verma, D.C. Pandey & Irodov Solutions

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FAQs on Index: Electrostatic Potential & Capacitance - Physics for Grade 12

1. What is electrostatic potential?
Ans. Electrostatic potential is the amount of work done in bringing a unit positive charge from infinity to a point in an electric field. It is a scalar quantity and is measured in volts (V).
2. What is the formula for calculating the electrostatic potential?
Ans. The formula for calculating electrostatic potential is V = kQ/r, where V is the electrostatic potential, k is the electrostatic constant (9 x 10^9 Nm^2/C^2), Q is the charge, and r is the distance from the charge.
3. How is capacitance defined?
Ans. Capacitance is a measure of a capacitor's ability to store electric charge. It is defined as the ratio of the magnitude of the charge on one of the plates to the potential difference across the plates. The unit of capacitance is the farad (F).
4. How can the capacitance of a capacitor be increased?
Ans. The capacitance of a capacitor can be increased by increasing the area of the plates, decreasing the distance between the plates, or by using a material with a higher permittivity between the plates. These factors directly affect the capacitance according to the formula C = ε0A/d, where C is the capacitance, ε0 is the permittivity of free space, A is the area of the plates, and d is the distance between the plates.
5. What is the relationship between potential difference and capacitance?
Ans. The potential difference across a capacitor is directly proportional to the charge stored on the capacitor and inversely proportional to the capacitance. Mathematically, it can be expressed as V = Q/C, where V is the potential difference, Q is the charge, and C is the capacitance. This means that for a given charge, a higher capacitance will result in a lower potential difference.
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