Question

Two metal plates having fixed charges $+q$ and $-q$ are immersed in a tank of oil. If the oil is pumped out, the electric field at a point midway between the plates will:

• A. Increased
• B. Remains the same
• C. Decreased
• D. Depends on oil

Answer 1

The correct option is A Increased

Two metal plates having fixed charges $+q$ and $-q$.

tank of oil. If the oil is pumped out. The electric field at a point midway between the plates will

$C=\frac{{ϵ}_{0}A}{d}$

$E=\frac{1}{4\pi {ϵ}_0}\frac{q}{r^2}$

If the $r$ decreased then the electric field is increased.