Electrical Power Quiz

What is the formula to calculate power?

• P = mgh

• P = E/t

• P = F/d

• P = V/I

A device has a resistance of 10 ohms and a current of 2 amps. What is the power consumed by the device?

• 5 watts

• 20 watts

• 40 watts

• 10 watts

A lamp is connected to a 120V power supply and draws a current of 0.5A. What is the power consumed by the lamp?

• 30W

• 90W

• 60W

• 120W

A motor has a power output of 500W and operates at a voltage of 120V. What is the current flowing through the motor?

• 2.5A

• 6.25A

• 8.33A

• 4.17A

A circuit has a power supply of 12V and a current of 2A. What is the power dissipated by a resistor connected in the circuit?

• 6W

• 36W

• 18W

• 24W

A device has a power consumption of 100W and operates at a voltage of 220V. What is the current flowing through the device?

• 0.4545 A

• 0.1 A

• 1 A

• 0.22 A

A circuit has a power supply of 9V and a resistance of 3 ohms. What is the current flowing through the circuit?

• 3A

• 1A

• 2A

• 4A

A device has a power consumption of 50W and operates at a current of 0.5A. What is the voltage across the device?

• 150V

• 75V

• 25V

• 100V

A circuit has a power supply of 24V and a current of 3A. What is the power dissipated by a resistor connected in the circuit?

• 72W

• 48W

• 36W

• 8W

A device has a power consumption of 75W and operates at a voltage of 120V. What is the resistance of the device?

• 50 ohms

• 100 ohms

• 150 ohms

• 192 ohms