NCERT Exercise 2.9 - Electrostatic Potential and Capacitance
Question: Explain what would happen if in the capacitor given in Exercise 2.8, a 3 mm thick mica sheet (dielectric constant = 6) were inserted between the plates, (a) while the voltage supply remained connected. (b) after the supply was disconnected.
Answer: (a) With supply connected: **V = 100 V**, **C = 108 pF**, **Q = 1.08 × 10⁻⁸ C**. (b) After disconnection: **Q = 1.8 × 10⁻⁹ C** (unchanged), **C = 108 pF**, **V = 16.6 V**.
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