A sheet of mica is inserted between the plates of an isolated charged parallel-plate capaci tor. Mica is a transparent mineral that comes naturally in thin sheets, and is an excellent dielectric. Which of the following statements is true? 1. The electric field between the capacitor

The statement which is true:

The potential difference across the capacitor decreases.

Explanation:

As given that the capacitor is isolated that means that the charge on the plates of the capacitor remains the same. When the dielectric as mica is inserted then the capacitance increases. As well as the potential difference across the capacitor decreases which can be understood by the following equation:

V = Q / C

where V show potential difference across the capacitor, Q is the charge and C is the capacitance.

As the capacitance increases the potential difference decreases and when the capacitance decreases the potential difference increases.