Rankers Physics

Capacitors: Practice Problem & Solution

Two parallel metal plates having charges $+Q$ and $-Q$ face each other at a certain distance between them. If the plates are now dipped in kerosene oil tank, the electric field between the plates will: (2010 Mains)
Become zero
Increase
Decrease
Remain same

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Capacitors. Understanding the underlying formula is key to arriving at the correct answer below:

The electric field between the plates in a medium is $E = \frac{\sigma}{\epsilon_{0}K}$. Since kerosene has a dielectric constant $K > 1$, the electric field will decrease.

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