Electric Power -Multiple Choice Questions Quiz

Interactive MCQs on “Electric Power”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is electric power?

(a) The rate of flow of electric charge in a circuit
(b) The amount of electric energy stored in a battery
(c) The rate at which electrical energy is converted into other forms of energy
(d) The measure of voltage drop in an electric circuit

Question 2: What is the SI unit of electric power?

(a) Joule (J)
(b) Volt (V)
(c) Watt (W)
(d) Ampere (A)

Question 3: Which formula represents the relationship between electric power (P), voltage (V), and current (I) in a direct current (DC) circuit?

(a) P = V/I
(b) P = VI
(c) P = V^2/I
(d) P = I^2V

Question 4: A device connected to a 120-volt power source draws a current of 5 amperes. What is the power consumed by the device?

(a) 600 watts
(b) 24 watts
(c) 500 watts
(d) 125 watts

Question 5: What is the power consumption of a 100-watt light bulb that operates for 5 hours?

(a) 2000 watt-hours
(b) 20 watt-hours
(c) 500 watt-hours
(d) 50 watt-hours

Question 6: Which of the following appliances will consume more electrical power when operated for the same amount of time?

(a) A 60-watt incandescent light bulb
(b) A 15-watt LED light bulb
(c) A 750-watt microwave oven
(d) A 500-watt space heater

Question 7: What is the power rating of an electrical device that requires 240 volts to operate and draws a current of 2.5 amperes?

(a) 60 watts
(b) 600 watts
(c) 500 watts
(d) 150 watts

Question 8: Which of the following is the most common unit used to measure residential electricity consumption?

(a) Kilowatt-hour (kWh)
(b) Joule (J)
(c) Watt (W)
(d) Coulomb (C)

Question 9: A washing machine consumes 2.5 kilowatt-hours of electricity for a complete wash cycle. If the cost of electricity is $0.15 per kilowatt-hour, how much does it cost to run the washing machine for one cycle?

(a) $0.10
(b) $0.25
(c) $0.375
(d) $0.75

Question 10: What happens to the electric power consumption of a device if the voltage supplied to it increases while keeping the current constant?

(a) Power consumption increases.
(b) Power consumption decreases.
(c) Power consumption remains unchanged.
(d) It depends on the type of device.