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.
A free electron is a valence electron that has broken away from its parent atom.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

2.
The atomic number is the number of neutrons in the nucleus.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

3.
The formula to find I when the values of V and R are known is
I = VR
I = R/V
V = IR
I = V/R
Your Answer: Option
(Not Answered)
Correct Answer: Option

4.
A series circuit consists of three resistors. Two resistors are 1.2 k each. The total resistance is 12 k. The value of the third resistor
is 9,600
is 960
is 1.2 k
cannot be determined
Your Answer: Option
(Not Answered)
Correct Answer: Option

5.
The term series opposing means that sources are in series with opposite polarities.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

6.
A 470 resistor, a 220 resistor, and a 100 resistor are all in parallel. The total resistance is approximately
790
470
60
30
Your Answer: Option
(Not Answered)
Correct Answer: Option
Explanation:
1/R = (1/470 + 1/220 + 1/100)

R = 59.98 ohm

7.
Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is
138
1,389
5,700
880
Your Answer: Option
(Not Answered)
Correct Answer: Option

8.
What is the current through R2?

177 mA
250 mA
500 mA
125 mA
Your Answer: Option
(Not Answered)
Correct Answer: Option

9.
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

10.
The instantaneous value is the voltage or current value of a waveform at its peak.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

11.
The winding resistance of a coil can be increased by
increasing the number of turns
using a thinner wire
changing the core material
increasing the number of turns or using thinner wire
Your Answer: Option
(Not Answered)
Correct Answer: Option

12.
The inductance of an iron-core coil decreases if
the number of turns is decreased
the iron core is removed
the length of the coil decreases
none of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option

13.
Energy is stored by an inductor in an electrostatic field.
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.
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit
increases
decreases
does not change
decreases to zero
Your Answer: Option
(Not Answered)
Correct Answer: Option

16.
A lower Q produces a narrower bandwidth.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

17.
Norton's theorem gives
an equivalent current source in parallel with an equivalent impedance
an equivalent current source in series with an equivalent impedance
an equivalent voltage source in parallel with an equivalent impedance
an equivalent voltage source in series with an equivalent impedance
Your Answer: Option
(Not Answered)
Correct Answer: Option

18.
Determine VTH for the circuit external to RL in the given figure.

13563.4° V
13.563.4° V
13.50° V
1350° V
Your Answer: Option
(Not Answered)
Correct Answer: Option

19.
Referring to the given circuit, what is ZTH if R1 is changed to 220 ?

22512.1°
22577.9°
4677.9°
4612.1°
Your Answer: Option
(Not Answered)
Correct Answer: Option

20.
A balanced load is one in which all the impedances are equal.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

*** END OF THE TEST ***
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