Electrical Concepts Quiz

What is the unit of electric current?

• Volt

• Ampere

• Ohm

• Watt

What is the unit of electric resistance?

• Ampere

• Ohm

• Volt

• Coulomb

Which device is used to measure electric current?

• Voltmeter

• Ammeter

• Ohmmeter

• Galvanometer

What is the purpose of a fuse in an electrical circuit?

• To increase voltage

• To prevent overheating and fires by breaking the circuit when current is too high

• To reduce resistance

• To store electric charge

What does Ohm’s Law state?

• Current is inversely proportional to voltage

• Voltage is directly proportional to current

• Resistance is proportional to power

• Power is inversely proportional to resistance

What is the unit of electrical power?

• Volt

• Ampere

• Joule

• Watt

What happens when you increase the voltage in a circuit with constant resistance?

• The current decreases

• The resistance increases

• The current increases

• The resistance decreases

Which of the following is a good conductor of electricity?

• Wood

• Rubber

• Copper

• Plastic

What is the role of a circuit breaker in an electrical circuit?

• To reduce voltage

• To protect the circuit from too much current

• To increase resistance

• To store energy

In a series circuit, what happens if one component fails?

• All components continue working

• Only one component stops working

• The entire circuit stops working

• The resistance increases