Online Electrical Engineering Test - Electrical Engineering Test - Random

Instruction:

  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
  • DO NOT refresh the page.
  • All the best!

Marks : 2/20


Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.

1.
If there is 6 A of current through the filament of a lamp, how many coulombs of charge move through the filament in 1.75 s?
10.5 C
105 C
3.4 C
34 C
Your Answer: Option
(Not Answered)
Correct Answer: Option

2.
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
Your Answer: Option
(Not Answered)
Correct Answer: Option

3.
When one of three series resistors is removed from a circuit and the circuit is reconnected, the current
increases
increases by one-third
decreases by one-third
decreases by the amount of current through the removed resistor
Your Answer: Option
(Not Answered)
Correct Answer: Option

4.
The output of a certain voltage divider is 12 V with no load. When a load is connected, the output voltage
decreases
increases
remains the same
becomes zero
Your Answer: Option
(Not Answered)
Correct Answer: Option

5.
A certain circuit is composed of two parallel resistors. The total resistance is 1,403 . One of the resistors is 2 k. The other resistor value is
1,403
4.7 k
2 k
3,403
Your Answer: Option
(Not Answered)
Correct Answer: Option

6.
A certain voltage divider consists of two 12 k resistors in series. Which of the following load resistors will have the most effect on the output voltage?
1 M
24 k
18 k
12 k
Your Answer: Option
(Not Answered)
Correct Answer: Option

7.
A Wheatstone bridge is often shown in a "diamond" configuration.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

8.
In assigning the direction of branch currents,
the directions are critical
the directions are not critical
they must point into a node
they must point out of a node
Your Answer: Option
(Not Answered)
Correct Answer: Option

9.
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is
1,000 V
2,000 V
31.25 V
3,125 V
Your Answer: Option
(Not Answered)
Correct Answer: Option

10.
When the current through the coil of an electromagnet reverses, the
direction of the magnetic field reverses
direction of the magnetic field remains unchanged
magnetic field expands
magnetic field collapses
Your Answer: Option
(Not Answered)
Correct Answer: Option

11.
A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is
6 V
30 V
35 V
0 V
Your Answer: Option
(Not Answered)
Correct Answer: Option

12.
The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately
6.9 H
14 H
2.2 H
155 H
Your Answer: Option
(Not Answered)
Correct Answer: Option

13.
A transformer changes ac to dc.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

14.
A 47 resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z?
129
12.9
167
73
Your Answer: Option
(Not Answered)
Correct Answer: Option

15.
A 1.2 k resistor is in series with a 15 mH coil across a 10 kHz ac source. The magnitude of the total impedance is
152.6
1,526
1,200
942
Your Answer: Option
(Not Answered)
Correct Answer: Option

16.
In a series RLC circuit that is operating above the resonant frequency, the current
lags the applied voltage
leads the applied voltage
is in phase with the applied voltage
is zero
Your Answer: Option
(Not Answered)
Correct Answer: Option

17.
Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if VS = 4.5 VRMS?

226 mW
2.26 mW
4.24 mW
424 mW
Your Answer: Option
(Not Answered)
Correct Answer: Option

18.
Referring to Problem 5, how long will it take the capacitor to discharge if the internal resistance of the pulse source is 100 ?
300 s
600 s
900 s
1.5 ms
Your Answer: Option
(Not Answered)
Correct Answer: Option

19.
If a periodic pulse waveform has a pulse width and the time between pulses each equal to or greater than five time constants, the capacitor will
partially charge and fully discharge during each period of the input waveform
fully charge and partially discharge during each period of the input waveform
fully charge and fully discharge during each period of the input waveform
partially charge and partially discharge during each period of the input waveform
Your Answer: Option
(Not Answered)
Correct Answer: Option

20.
In an RL differentiating circuit, the output voltage is taken across the resistor.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

*** END OF THE TEST ***
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