Basic Electrical Engineering Quiz: Test!

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| By Ashish Desai

Ashish Desai

Community Contributor

Quizzes Created: 1 | Total Attempts: 3,075

Questions: 10 | Attempts: 3,082 | Updated: Apr 19, 2024

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Questions and Answers

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. Silver

Explanation
The resistivity of silver is about 1.59 × 10−8 Ωm at 20 degrees Celsius.

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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. Joule

Explanation
Joule is the SI Unit of Energy all others are the unit of Energy but not the SI Unit of energy.

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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. 1:1

Explanation
As the materials are same (pA=pB) the ratio will be 1:1

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6.

Four resistances 2Ω,4Ω,5Ω,20Ω
- A.
  
  1Ω
- B.
  
  2Ω
- C.
  
  4Ω
- D.
  
  5Ω
Correct Answer
A. 1Ω

Explanation
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
=1Ω

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3
1
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. 10⁷

Explanation
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.

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1
1
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 energy

Explanation
Definition :- Active elements in the circuit is one which supplies energy

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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. 31Ω

Explanation
V=I*R
R=V/I
=110/3.5
=31Ω

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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. Eight

Explanation
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

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Current Version
Apr 19, 2024

Quiz Edited by
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Apr 17, 2020

Quiz Created by
Ashish Desai

Basic Electrical Engineering Quiz: Test!

What is the unit of current?

Which of the following materials possesses the least specific resistivity?

The Curve representing Ohm's law is?

The SI unit of electrical energy is?

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?

Four resistances 2Ω,4Ω,5Ω,20Ω

Electrical conductivity of metals is typically of the order of (in Ω-1*m-1)

Active Element in the circuit is one which

An electric heater draws 3.5 A from a 110 V source. The resistance of the heating elements is approximately?

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?

Electrical conductivity of metals is typically of the order of (in Ω^-1*m^-1)