Capacitor Quiz

Who were the inventors of the capacitor?

• James Watt and Michael Faraday

• Thomas Edison and Nikola Tesla

• Ewald Georg von Kleist and Pieter van Musschenbroek

• Albert Einstein and Isaac Newton

Match the following functions with their descriptions:

• Function of an amplifier

• To generate electrical energy

• Function of an electric motor

• To amplify electrical signals

• Function of a generator

• To convert electrical energy to mechanical energy

• Function of a capacitor

• To store electrical energy

What is the unit of capacitance?

• Ohm

• Volt

• Watt

• Farad

The dielectric in a capacitor is (a)  

• An insulating material
• A conducting material
• A magnetic material
• A superconducting material

What happens when a capacitor is connected across a battery?

• The capacitor becomes a resistor

• The capacitor generates electricity

• The capacitor discharges completely

• An electric field develops across the dielectric

What is the historical name for a capacitor?

• Condenser

• Accumulator

• Transformer

• Inductor

What is the hydraulic analogy for a capacitor?

• An elastic diaphragm within a pipe

• A water pump

• A water turbine

• A water reservoir

What is the effect of dielectric absorption in capacitors?

• It causes the capacitor to regain some charge after being discharged

• It increases the capacitance

• It decreases the capacitance

• It makes the capacitor a perfect insulator

What is the equivalent circuit of a real capacitor?

• A battery in parallel with a resistor

• A resistor in series with an inductor

• A perfect capacitor

• A capacitor with series inductance and resistance, and parallel conductance

What is the breakdown voltage of a capacitor?

• The voltage at which the dielectric becomes conductive

• The maximum voltage the capacitor can store

• The voltage at which the capacitor explodes

• The voltage at which the capacitor stops working