Parallel Plate Capacitor: Practice Problem & Solution
Assertion (A): If one plate of a charged parallel plate capacitor is dipped in water and other plate is above it, then water level will rise in capacitor. Reason (R): Total charge on plates increases.
Short Solution (Best for NEET):
To solve this problem, we apply the core principles of Parallel Plate Capacitor. Understanding the underlying formula is key to arriving at the correct answer below:
When one plate of a charged capacitor is dipped in water, water acts as a dielectric. The force on the dielectric (water) pulls it into the capacitor, causing the water level to rise. The capacitor is disconnected, so the total charge \( Q \) on the plates remains constant. Therefore, (R) is false, but (A) is true.
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