What is the unit of electrical resistance?

A. Joule

B. Ohm

C. Watt

D. Volt

Question 2. What is the unit of electrical power?

A. Watt

B. Joule

C. Ohm

D. Ampere

Question 3. Which of the following devices is used to store electrical energy?

A. Resistor

B. Inductor

C. Capacitor

D. Transistor

Question 4. What is the purpose of a ground wire?

A. To carry current in case of a short circuit

B. To reduce electrical noise

C. To protect against electric shock

D. To provide a return path for current

Question 5. Which of the following is used to step up or step down AC voltage?

A. Capacitor

B. Resistor

C. Transformer

D. Inductor

Question 6. What is the purpose of a circuit breaker?

A. To provide a path for current in case of a short circuit

B. To reduce electrical noise

C. To control the flow of current

D. To protect against overcurrent and short circuits

Question 7. What is the difference between a fuse and a circuit breaker?

A. A fuse can be reset, but a circuit breaker cannot.

B. A circuit breaker is used to protect against voltage spikes, while a fuse is not.

C. A fuse is a one-time use component, while a circuit breaker can be reset and used multiple times.

D. A circuit breaker is used in DC circuits, while a fuse is used in AC circuits.

Question 8. Which of the following is used to control the flow of current in a circuit?

A. Resistor

B. Capacitor

C. Diode

D. Transistor

Question 9. What is the purpose of a rectifier?

A. To convert AC to DC

B. To convert DC to AC

C. To store electrical energy

D. To amplify electronic signals

Question 10. Which of the following is used to measure electrical current?

A. Voltmeter

B. Ammeter

C. Ohmmeter

D. Wattmeter