Electrical Engineering Test - Random - Online Electrical Engineering Test

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Marks : 2/20

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The number of kilowatts in 135 milliwatts is

1.35 × 10^–4 kW

135 × 10^–3 kW

0.0135 kW

0.00135 kW

[#]

A wiper is the sliding contact in a

switch

photoconductive cell

thermistor

potentiometer

[#]

Resistance limits the current.

True

False

[#]

In 40 kW, there are

0.4 mW

40,000 W

400 W

5,000 W

[#]

Energy equals power multiplied by time.

True

False

[#]

The total resistance of eight 5.6 k

resistors in series is

5,600

4,480

44,800

[#]

A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 k

. The current through each bulb is approximately

610 mA

18 mA

110 mA

61 mA

[#]

The internal resistance of a 30,000 ohm/volt voltmeter set on its 50 V range is

15,000

150,000

1,500,000

15,000,000

[#]

A certain voltage divider consists of three 1 k

resistors in series. Which of the following load resistors will have the least effect on the output voltage?

1 M

100 k

1 k

330

[#]

10.

Referring to circuit given, if R₁ is changed to a 68

resistor, what will be the current through it?

0.16 A

0.24 A

0.2 A

0.04 A

[#]

11.

Lenz's law defines the polarity of the induced voltage.

True

False

[#]

12.

To step 110 V ac down to 20 V ac, the turns ratio must be

5.5

0.18

0.018

[#]

13.

A transformer

changes ac to dc

changes dc to ac

steps up or down dc voltages

steps up or down ac voltages

[#]

14.

A center tap (CT) is a connection at the midpoint of the secondary winding of a transformer.

True

False

[#]

15.

The complex number 40

55° is equivalent to

55 + j55

40 + j40

45.88 + j65.52

22.94 + j32.76

[#]

16.

In a series RC circuit, 12 V_(rms) is measured across the resistor and 15 V_(rms) is measured across the capacitor. The rms source voltage is

3 V

27 V

19.2 V

1.9 V

[#]

17.

In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is

6 A

424 mA

4.24 A

42.4 A

[#]

18.

The Thevenin equivalent voltage is

equal to the source voltage

the same as the load voltage

the open circuit voltage

none of the above

[#]

19.

In an RL differentiating circuit, the output voltage is taken across the resistor.

True

False

[#]

20.

In a

-connected source driving a

-connected load, the

load voltage and line voltage are one-third the source voltage for a given phase

load voltage and line voltage are two-thirds the source voltage for a given phase

load voltage and line voltage cancel for a given phase

load voltage, line voltage, and source phase voltage are all equal for a given phase

[#]

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Online Electrical Engineering Test - Electrical Engineering Test - Random

Marks : 2/20

Test Review : View answers and explanation for this test.

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