Capacitors - Technical MCQs

Q1:

What do variable capacitors use for dielectric?

A ceramic, electrolytic, mica, or paper

B air, ceramic, mica, or plastic

C ceramic, paper, plastic, or mica

D mica, ceramic, plastic, or electrolytic

ANS:B - air, ceramic, mica, or plastic

For variable capacitance, air is used as dielectric.