Basic Electrical Engineering Quiz: Test!
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- 1.
What is the unit of current?
- A.
Ampere
- B.
Voltage
- C.
Meter
- D.
None of above
Correct Answer
A. Ampere -
- 2.
Which of the following materials possesses the least specific resistivity?
- A.
Aluminium
- B.
Copper
- C.
Silver
- D.
Iron
- E.
None of Above
Correct Answer
C. SilverExplanation
The resistivity of silver is about 1.59 × 10−8 Ωm at 20 degrees Celsius.Rate this question:
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- 3.
The Curve representing Ohm's law is?
- A.
Linear
- B.
Hyperbolic
- C.
Parabolic
- D.
Triangular
Correct Answer
A. Linear -
- 4.
The SI unit of electrical energy is?
- A.
Watt-Second
- B.
Joule
- C.
KWh
- D.
Volt-Ampere Second
Correct Answer
B. JouleExplanation
Joule is the SI Unit of Energy all others are the unit of Energy but not the SI Unit of energy.Rate this question:
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- 5.
Two wires A and B of the same Material but of different lengths L and 2L have the radius r and 2r respectively. The ratio of specific resistance will be?
- A.
1:4
- B.
1:8
- C.
1:1
- D.
1:2
Correct Answer
C. 1:1Explanation
As the materials are same (pA=pB) the ratio will be 1:1Rate this question:
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- 6.
Four resistances 2Ω,4Ω,5Ω,20Ω
- A.
1Ω
- B.
2Ω
- C.
4Ω
- D.
5Ω
Correct Answer
A. 1ΩExplanation
1/R=1/R1+1/R1 +1/R1+1/R1
=1/2+1/4 +1/5+1/20
=10+5+4+1/20
=20/20
=1ΩRate this question:
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- 7.
Electrical conductivity of metals is typically of the order of (in Ω-1*m-1)
- A.
107
- B.
105
- C.
10-4
- D.
10-6
Correct Answer
A. 107Explanation
Metals have high electrical conductivity due to the presence of free electrons that can easily move through the material. The unit of electrical conductivity is Ω-1*m-1, which represents the ease with which electric current can flow through a material. A conductivity value of 107 Ω-1*m-1 indicates a very high conductivity, meaning that metals can conduct electricity very effectively.Rate this question:
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- 8.
Active Element in the circuit is one which
- A.
Dissipates Energy
- B.
Receive Energy
- C.
Both receives and supplies
- D.
Supplies energy
Correct Answer
D. Supplies energyExplanation
Definition :- Active elements in the circuit is one which supplies energyRate this question:
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- 9.
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating elements is approximately?
- A.
31Ω
- B.
3.1Ω
- C.
385Ω
- D.
38.5Ω
Correct Answer
A. 31ΩExplanation
V=I*R
R=V/I
=110/3.5
=31ΩRate this question:
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- 10.
We have three resistances each of 1Ω,2Ω and 3Ω. If all the three resistances are to be connected in a circuit, how many different values of equivalent resistances are possible?
- A.
Five
- B.
Six
- C.
Seven
- D.
Eight
Correct Answer
D. EightExplanation
R1=1Ω,R2=1Ω R3=1Ω
1) R1, R2, R3 in series
2)R1, R2, R3 in parallel
3)R1,in series with parallel combination R2 &R3
4)R2,in series with parallel combination R1 &R3
5)R3,in series with parallel combination R1 &R2
6)R1,in parallel with series combination R2 &R3
7)R2,in parallel with series combination R1 &R3
8)R3,in parallel with series combination R2 &R1
Rate this question:
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Current Version
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Apr 19, 2024Quiz Edited by
ProProfs Editorial Team -
Apr 17, 2020Quiz Created by
Ashish Desai
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