Free Printable CHAPTER 4 ALTERNATING CURRENT CIRCUITS

Worksheets

CHAPTER 4 ALTERNATING CURRENT CIRCUITS

Total questions: 30

Worksheet time: 5hrs 0mins

Name

Class

Date

The period of an ac waveform is

the same as frequency

time required to complete one cycle

expressed in amperes

none of the above

An alternating voltage has the equation v = 141.4 sin 377t . Determine the frequency.

40 Hz

50 Hz

60 Hz

70 Hz

A heater is rated as 230 V, 10 kW. The value 230 V refers to

average voltage

r.m.s voltage

peak voltage

If a sinusoidal wave has a frequency of 50 Hz with 30 A r.m.s current, which of the following equation represents the wave?

42.42 sin 314.2t

60 sin 25t

30 sin 50t

84.84 sin 25t

Those statement describe period except

Time required for a sine wave to complete one full cycle.

It is equal to frequency.

Unit = second

T = 1/f

The RMS voltage of a sine wave is the same as the average voltage:

True

False

RMS voltage of a sine wave is the same as:

Effective voltage

Average voltage

Digital equivalent

To find the equivalent energy (power) of a 12 volt battery, which of the following has an EFFECTIVE voltage of 12?

24 volts Vpp

34 volts Vpp

34 volts Vp

The amount of time for one complete cycle is called?

Frequency

Period

10.

To find the peak voltage of a waveform you:

Divide Peak to peak by two

Multiply Peak to Peak by 2

Divide peak by 0.707

11.

An alternating voltage has the equation V(t) = (150 sin 3881t) V, determine instantaneous voltage when t = 5 ms.

67.3 V

75.5 V

79.1 V

80.9 V

12.

From the graph, calculate the instantaneous current when t=8ms.

50 mA

100 mA

150 mA

200 mA

13.

The voltage across and the current flows through a series connected loads are

V(t) = (60 cos 100πt - 10°) V, I(t) = (1.5 cos 100πt + 50°)A. Determine the phase difference between voltage and current.

10 $\degree$

40 $\degree$

50 $\degree$

60 $\degree$

14.

From the graph, determine the root mean square value of the voltage.

14.14 V

15.14 V

20 V

20.14 V

15.

From the graph, determine the angular velocity.

685.5 rad/s

785.4 rad/s

885.4 rad/s

985.5 rad/s

16.

The following statement describe about an capacitance except...

ability to store charge for a given amount of voltage supply

represented by C

standard unit is Farad

voltage is always leading current

17.

The following statement describe about an inductance except...

it is the opposition that a substance offer to the current flow

represented by L

standard unit is Henry

current always lagging voltage

18.

Find the sum.
(5-2i) + (-7+8i)

-2+6i

12+6i

-35-16i²

-35 -16i

19.

$\frac{10\angle-10}{5\angle30}$ is

$2\angle-40$

$5\angle20$

20.

$2\angle25\times4\angle-10$ is

$6\angle15$

$8\angle250$

$8\angle35$

$8\angle15$

21.

The use of inductor?

Passive component that store food in a fridge when electric current flows through it.

Passive component that store energy in a magnetic field when electric current flow through it

Passive component that store electric charge in an AC circuit.

Passive component that limit the current flow.

22.

$v=40\angle60^0\$ voltage is connected across series R and L. A current $i=10\angle30^0$ is flowing in the circuit. Assuming 50 Hz single phase AC supply, the value of R and L will be

3.464 ohm and 6.37 mH

3.56 ohm and 9.37 mH

3.464 ohm and 6 mH

3.464 ohm and 16.37 mH

23.

The correct current-voltage representation for the circuit is

24.

An alternating current with 200 V voltage and 25 Hz frequency is flowing through a 200 Ω resistor and $\frac{100}{\pi}\mu F$ capacitor in a series circuit. Calculate the amount of current flow throughout the circuit.

$\frac{1}{2}\sqrt{2}$ A

$\frac{1}{2}\sqrt{3}$ A

$\frac{1}{2}$ A

- $\frac{1}{2}\sqrt{2}$ A

$\frac{1}{4}\sqrt{3}$ A

25.

Calculate the power dissipate by the circuit.

500

500 √2

1000

1250 √2

1250

26.

Referring to the RLC circuit, calculate the impedance.

290 Ω

390 Ω

250 Ω

350 Ω

27.

The voltage of ( $100\sqrt{2}\sin\ 1000t$ ) volt is connect with RLC components of R = 400 ohm, L = 0,5 H dan C = 5 $\mu$ F in series. Calculate the power dissipates for the circuit.

10 Watt

20 Watt

5 Watt

15 Watt

25 Watt

28.

Referring to the circuit, the value of the inductor is

2.5 H

2.0 H

0.4 H

0.2 H

29.

A resistor, capacitor and inductor is connected in series with resistance of R = 400 Ω, inductive reactance of X_L = 500 Ω dan impedance of Z = 500 Ω. Calculate the value of capacitive reactance from the capcitor.

200 Ω

300 Ω

400 Ω

500 Ω

30.

Referring to the RLC circuit, the current flow is

2 A

2.4 A

1.3 A

1.5 A

Reset

CHAPTER 4 ALTERNATING CURRENT CIRCUITS

Total questions: 30

Worksheet time: 5hrs 0mins

Similar Resources on Wayground