AC and DC Circuit Quiz

Zoe is working on a project involving an AC circuit. What is the primary function of a capacitor in her circuit?

• To store energy in the form of a magnetic field

• To store energy in the form of an electric field

• To convert AC to DC

• To increase the frequency of the circuit

A circuit has a voltage of 120V and a current of 5A. What is the power consumed by the circuit?

• 24W

• 600W

• 125W

• 240W

• 50 Hz

• 100 Hz

• 200 Hz

• 25 Hz

• 1.5 A

• 3 A

• 6 A

• 9 A

Which of the following statements is true about the phase relationship between voltage and current in a purely inductive AC circuit?

• Voltage leads current by 90 degrees

• Current leads voltage by 90 degrees

• Voltage and current are in phase

• Voltage lags current by 90 degrees

In a DC circuit, if the resistance is doubled while the voltage remains constant, what happens to the current?

• It doubles

• It halves

• It remains the same

• It becomes zero

A 60W light bulb is connected to a 120V AC supply. What is the current flowing through the bulb?

• 0.5 A

• 1 A

• 2 A

• 0.25 A

• 5 A

• 10 A

• 20 A

• 15 A

A DC circuit has a power supply of 24V and a total resistance of 8Ω. Calculate the power dissipated in the circuit.

• 48 W

• 72 W

• 96 W

• 36 W