Electricity Fundamentals Quiz

What is the scientific definition of electricity?

• A material that provides resistance to electrical flow.

• A flow of electrons under pressure through something that offers resistance.

• A device that converts energy to light.

• A source of energy that can be easily converted to heat.

In the analogy comparing electricity to water flow, what does the flow in water correspond to in electricity?

• Watts

• Amperes (amps)

• Ohms

• Joules

Which of the following best defines resistance in electricity?

• The energy per second supplied by the current.

• Any tendency of a matter to prevent electrical flow.

• A material that allows electricity to flow easily.

• A device that converts electrical energy to light.

Which of the following materials is a good conductor of electricity?

• Rubber

• Vinyl

• Silver

• Air

What is the role of an insulator in an electrical circuit?

• To allow electricity to flow easily.

• To provide great resistance to the flow of electricity.

• To convert electrical energy to light.

• To measure electrical current.

Which of the following best describes electric power?

• The energy per second supplied by the current.

• The resistance to electrical flow.

• The flow of electrons under pressure.

• The material that conducts electricity.

Why does the filament in a bulb glow without burning out?

• It is made of plastic.

• It is surrounded by oxygen.

• It is a special metal element in a vacuum tube.

• It is covered with rubber.

Which unit is used to measure the pressure that causes current to flow in a circuit?

• Volt

• Watt

• Ampere

• Horsepower

What does the unit "ampere" (amps) measure?

• The amount of current flowing through a wire or motor

• The pressure causing current to flow

• The use of 1000 watts for one hour

• The mechanical power equal to 746 watts

How many watts are in one kilowatt?

• 1000

• 746

• 120

• 1