Exploring AC and DC Circuits

What is the primary function of a resistor in an AC circuit?

• To store energy

• To resist the flow of current

• To amplify signals

• To convert AC to DC

Which component is used to store electrical energy in an electric field in AC circuits?

• Resistor

• Inductor

• Capacitor

• Transformer

In a DC circuit, if the voltage is 12V and the current is 2A, what is the power consumed by the circuit?

• 6W

• 12W

• 24W

• 48W

Explain why AC is generally used for power distribution over long distances instead of DC.

• AC is easier to generate

• AC can be easily transformed to different voltages

• AC is safer than DC

• AC has less power loss over long distances

Compare the frequency characteristics of AC and DC.

• AC has a constant frequency, DC has a variable frequency

• AC has a variable frequency, DC has a constant frequency

• AC has a constant frequency, DC has zero frequency

• AC has a variable frequency, DC has zero frequency

What is the phase difference between voltage and current in a purely resistive AC circuit?

• 0 degrees

• 45 degrees

• 90 degrees

• 180 degrees

• 1A

• 2A

• 3A

• 4A

Analyze the impact of increasing frequency on the impedance of an AC circuit containing an inductor.

• Impedance decreases

• Impedance remains constant

• Impedance increases

• Impedance becomes zero