Online Electrical Engineering Test - Electrical Engineering Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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The number 4,500,000 can be expressed as

4,500 × 10⁶

4.5 × 10⁶

4.5 × 10^-3

either 4,500 × 10⁴ or 4.5 × 10⁶

[#]

The number 4.4 × 10⁶ ohms expressed using a metric prefix is

4 k

4.4 k

4 M

4.4 M

[#]

When converting 0.16 mA to microamperes, the result is

16 µA

160 µA

1,600 µA

0.0016 µA

[#]

The colored bands for a 4,700 ohm resistor with a ten percent tolerance are

yellow, violet, red, gold

yellow, violet, orange, gold

yellow, violet, red, silver

orange, violet, red, silver

[#]

If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is

50 mA

70 mA

120 mA

40 mA

[#]

The higher the range setting, the less the internal resistance and the greater the load effect of the voltmeter on a circuit.

True

False

[#]

Reluctance in a magnetic circuit is analogous to current in an electrical circuit.

True

False

[#]

A 1 kHz signal has a period of 1 ms.

True

False

[#]

Which of the following capacitors is polarized?

mica

ceramic

plastic-film

electrolytic

[#]

10.

A 320

H coil is in series with a 3.3 k

resistor. How long does it take for current to build up to its full value?

0.48 s

0.48 ms

0.48

48 s

[#]

11.

When a 200

load resistor is connected across the secondary winding of a transformer with a turns ratio of 4, the source "sees" a reflective load of

12.5

800

[#]

12.

A 470

resistor and a 200 mH coil are in parallel. Both components are across a 1.5 kHz ac source. The total admittance of the circuit, in polar form, is

12.60

–76° mS

12.18

76° mS

218

–76° mS

12.18

–76° mS

[#]

13.

In a lag network, the output voltage lags the input voltage in phase.

True

False

[#]

14.

A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will

increase

remain the same

decrease

be less selective

[#]

15.

A parallel resonant band-pass filter consists of a 6.8

resistor in series with a parallel network made up of an 8

H coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume R_W = 0

. What is the center frequency of the filter?

5.14 MHz

514 kHz

5.03 MHz

503 kHz

[#]

16.

In an RL high-pass filter, the output is taken across the inductor and the output leads the input.

True

False

[#]

17.

The Norton equivalent current is

the current through the load

the open-current from the source

the short circuit current

none of the above

[#]

18.

Referring to the given circuit, L

must be in parallel with R_L

must be placed in parallel with V_S

must have a reactance equal to X_C

has no effect on the result

[#]

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.

An integrator consists of a 3.3 k

resistor and a 2

F capacitor. A single 30 V, 6 ms pulse is applied to the input. How much will the capacitor charge?

10.3 V

30 V

12.09 V

17.91 V

[#]

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