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Block 4 AC Terms

Total questions: 17

Worksheet time: 10mins

Name
Class
Date
1.

What is the unit of measure for frequency in AC circuits?

a)

Hertz (Hz)

b)

Volt (V)

c)

Ampere (A)

d)

Ohm (Ω)

2.

In an AC circuit, what component stores energy in a magnetic field?

a)

Resistor

b)

Capacitor

c)

Inductor

d)

Transformer

3.

What type of current continuously changes direction?

a)

Direct Current (DC)

b)

Alternating Current (AC)

c)

Static Current

d)

Pulsating DC

4.

What is the opposition to current flow in an AC circuit due to inductance and capacitance called?

a)

Resistance

b)

Reactance

c)

Impedance

d)

Conductance

5.

Which device in an AC circuit can step up or step down voltage levels?

a)

Resistor

b)

Transformer

c)

Capacitor

d)

Inductor

6.

What is the term for the maximum value reached by an alternating quantity during one cycle?

a)

Average Value

b)

RMS Value

c)

Peak Value

d)

Instantaneous Value

7.

What type of circuit has the same current flowing through all components?

a)

Parallel Circuit

b)

Series Circuit

c)

Complex Circuit

8.

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

a)

90 degrees

b)

45 degrees

c)

0 degrees

d)

180 degrees

9.

What happens to the capacitive reactance (XC) as the frequency of the AC signal increases?

a)

Increases

b)

Decreases

c)

Remains the same

d)

Becomes zero

10.

What term describes the power consumed in an AC circuit where voltage and current are in phase?

a)

Reactive Power

b)

Apparent Power

c)

True Power

d)

Complex Power

11.

What is the purpose of a capacitor in an AC circuit?

a)

To store energy in an electric field

b)

To increase resistance

c)

To convert AC to DC

d)

To step up voltage

12.

Which factor in an AC circuit determines how much power is effectively used?

a)

Power Factor

b)

Voltage

c)

Current

d)

Frequency

13.

What type of circuit has more than one path for current to flow?

a)

Series Circuit

b)

Parallel Circuit

c)

Resonant Circuit

d)

Open Circuit

14.

What component in an AC circuit opposes the change in current?

a)

Resistor

b)

Capacitor

c)

Inductor

15.

What term is used to describe the product of the voltage and current in an AC circuit, without considering the phase angle?

a)

True Power

b)

Apparent Power

c)

Reactive Power

d)

Complex Power

16.
A ______ opens and closes a circuit. 
a)
power source
b)
conductor
c)
switch
d)
output device
17.

What component does the picture above represent?

a)

Battery

b)

Light bulb

c)

Ammeter

d)

Resistor