Online Electrical Engineering Test - Electrical Engineering Test 9



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Instruction:

  • This is a FREE online test. DO NOT pay money to anyone to attend this test.
  • Total number of questions : 20.
  • Time alloted : 30 minutes.
  • Each question carry 1 mark, no negative marks.
  • DO NOT refresh the page.
  • All the best :-).


1.

The number 4.38 × 10–3 expressed as a number having a power of 10–6 is

A.
4,380 × 10–6
B.
438 × 10–6
C.
43,800 × 10–6
D.
438,000 × 10–6

Your Answer: Option (Not Answered)

Correct Answer: Option A

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2.

The quantity 43 × 10-3 is the same as

A.
0.043
B.
0.430
C.
430
D.
43,000

Your Answer: Option (Not Answered)

Correct Answer: Option A

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3.

A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume?

A.
20.16 kWh
B.
201.6 kWh
C.
2.01 kWh
D.
8.4 kWh

Your Answer: Option (Not Answered)

Correct Answer: Option B

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4.

The following resistors (one each) are connected in a series circuit: 470 , 680 , 1 k, and 1.2 k. The voltage source is 20 V. Current through the 680 resistor is approximately

A.
60 mA
B.
30 mA
C.
6 mA
D.
300 mA

Your Answer: Option (Not Answered)

Correct Answer: Option C

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5.

The sum of all the voltage drops around a single closed loop in a circuit is zero.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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6.

Find the total current through R3 in the given circuit.

A.
7.3 mA
B.
5.5 mA
C.
12.8 mA
D.
1.8 mA

Your Answer: Option (Not Answered)

Correct Answer: Option D

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7.

A phasor represents

A.
the magnitude and a quantity direction
B.
the width of a quantity
C.
the phase angle
D.
the magnitude of a quantity

Your Answer: Option (Not Answered)

Correct Answer: Option A

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8.

Of the following capacitors, which one has the highest dielectric constant?

A.
air
B.
mica
C.
glass
D.
paper

Your Answer: Option (Not Answered)

Correct Answer: Option C

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9.

Faraday's law states that relative motion between a magnetic field and a coil induces a voltage across the coil.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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10.

Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Explanation:

Some factors that affect the inductance of a coil include:

1. The inductance is proportional to the square of the number of turns;
2. The inductance increases directly as the permeability of the core material increases;
3. The inductance increases directly as the cross-sectional area increases; and
4. The inductance decreases as its length increases.

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11.

If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is

A.
25 W
B.
0 W
C.
250 W
D.
2.5 W

Your Answer: Option (Not Answered)

Correct Answer: Option A

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12.

A transformer changes ac to dc.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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13.

A filter passes all frequencies.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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14.

To tune a parallel resonant circuit to a higher frequency, the capacitance should be

A.
increased
B.
decreased
C.
left alone
D.
replaced with inductance

Your Answer: Option (Not Answered)

Correct Answer: Option B

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15.

A series resonant circuit is commonly called a tank circuit.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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16.

Referring to the given circuit, find ZTH if R is 15 k and RL is 38 k.

A.
89.82 –51.3° k
B.
19.2 –38.3° k
C.
9.38–51.3° k
D.
180 –38.3° k

Your Answer: Option (Not Answered)

Correct Answer: Option C

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17.

In an ac circuit, power to the load peaks at the frequency at which the load impedance is the complex conjugate of the output impedance.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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18.

The superposition theorem is useful for the analysis of single-source circuits.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

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19.

Like Thevenin's theorem, Norton's theorem provides a method of reducing a more complex circuit to a simpler, more manageable form for analysis.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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20.

A balanced load is one in which all the impedances are equal.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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