Electrical Engineering Test 9 - 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 quantity 43 × 10^-3 is the same as

0.043

0.430

430

43,000

[#]

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

4,380 × 10^–6

438 × 10^–6

43,800 × 10^–6

438,000 × 10^–6

[#]

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?

20.16 kWh

201.6 kWh

2.01 kWh

8.4 kWh

[#]

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

60 mA

30 mA

6 mA

300 mA

[#]

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

True

False

[#]

Find the total current through R₃ in the given circuit.

7.3 mA

5.5 mA

12.8 mA

1.8 mA

[#]

A phasor represents

the magnitude and a quantity direction

the width of a quantity

the phase angle

the magnitude of a quantity

[#]

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

air

mica

glass

paper

[#]

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

True

False

[#]

10.

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

True

False

[#]

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

25 W

0 W

250 W

2.5 W

[#]

12.

A transformer changes ac to dc.

True

False

[#]

13.

A filter passes all frequencies.

True

False

[#]

14.

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

increased

decreased

left alone

replaced with inductance

[#]

15.

A series resonant circuit is commonly called a tank circuit.

True

False

[#]

16.

Referring to the given circuit, find Z_TH if R is 15 k

and R_L is 38 k

89.82

–51.3° k

19.2

–38.3° k

9.38

–51.3° k

180

–38.3° k

[#]

17.

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

True

False

[#]

18.

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

True

False

[#]

19.

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.

True

False

[#]

20.

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

True

False

[#]

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Online Electrical Engineering Test - Electrical Engineering Test 9

Marks : 2/20

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