Electrical Power Quiz

What is the formula to calculate power?

• P = F/d

• P = W/t

• P = V/I

• P = mgh

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

• 40 watts

• 80 watts

• 20 watts

• 5 watts

A circuit has a voltage of 12 volts and a current of 3 amps. What is the power delivered by the circuit?

• 24 watts

• 9 watts

• 15 watts

• 36 watts

In a series circuit, if the total resistance is 20 ohms and the current is 5 amps, what is the power dissipated by the circuit?

• 1000 watts

• 500 watts

• 250 watts

• 100 watts

In a parallel circuit, if the voltage across each resistor is 10 volts and the current through each resistor is 2 amps, what is the total power consumed by the circuit?

• 40 watts

• 20 watts

• 60 watts

• 80 watts

A device has a power rating of 100 watts and operates at a voltage of 120 volts. What is the current consumed by the device?

• 1.2 amps

• 10 amps

• 50 amps

• 0.8333 amps

In a series circuit, if the total power dissipated is 200 watts and the current is 10 amps, what is the total resistance of the circuit?

• 2

• 500

• 100

• 20

In a parallel circuit, if the total power consumed is 500 watts and the voltage across each resistor is 50 volts, what is the total current flowing through the circuit?

• 250

• 100

• 10

• 5

A circuit has a power of 800 watts and a voltage of 200 volts. What is the current flowing through the circuit?

• 2

• 6

• 4

• 10

In a series circuit, if the total power dissipated is 600 watts and the voltage is 120 volts, what is the total resistance of the circuit?

• 10

• 100

• 50

• 24