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# The potential difference between the two plates of a parallel plate capacitor is constant. When air between the plates is replaced by dielectric material, the electric field intensity:(A) Decreases(B) Remains unchanged(C) Becomes zero(D) Increases

Last updated date: 20th Jun 2024
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We should know that an RC circuit is a circuit with both a resistor or R and a capacitor or C. RC circuits are frequent elements in electronic devices. They also play an important role in the transmission of electrical signals in nerve cells. The RC circuit is used in camera flashes, pacemaker, timing circuit etc. The RC signal filters the signals by blocking some frequencies and allowing others to pass through it. It is also called first-order RC circuit and is used to filter the signals bypassing some frequencies and blocking others. It is required to use this concept to solve this question.

$\mathrm{C}=\dfrac{\mathrm{k} \epsilon_{0} \mathrm{A}}{\mathrm{d}}$
where C is capacitance, k is relative permittivity of dielectric material, $\epsilon_{0}$ is permittivity of free space constant, A is area of plates and d is distance between them.