Electric Circuits Questions and Answers – Voltage and Current Sources ,Electrical Resistance

This set of Electric Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Voltage and Current Sources, Electrical Resistance”.

1. The symbol used for representing Independent sources
a) Diamond
b) Square
c) Circle
d) Triangle
View Answer

Answer: c
Explanation: Independent sources are represented by circle
Dependent sources are represented by Diamond.

2. Controlled sources are also known as
a) Independent sources
b) Dependent sources
c) Ideal sources
d) Voltage sources
View Answer

Answer: a
Explanation: Voltage V = dw/dq and its SI unit is Volt.

3. I3 = α vx. This is _________
The diagram is Current control voltage source if I3 = alpha vx
a) Voltage control voltage source
b) Current control voltage source
c) Voltage control current source
d) Current control current source
View Answer

Answer: b
Explanation: i3 =αvx means ix value depends on vx
Controlled voltage is vx.

4. Inductor is _______________ element.
a) Active
b) Passive
c) Linear
d) Polar
View Answer

Answer: b
Explanation: Passive element means it could not generate electricity.

5. Which of the below is valid?
Find the given diagram is valid or not
a) 1
b) 2
c) Both
d) Neither 1 nor 2
View Answer

Answer: a
Explanation: Same Voltage

6. The below circuit is valid.
The diagram is valid for independent current supplied current through terminals a & b
a) False
b) True
View Answer

Answer: b
Explanation: Independent current source supplied current through terminals a and b. Dependent source supplies voltage across the same pair of terminals and an ideal current source supplies same current regardless of voltage, similarly an ideal voltage source supplies same voltage irrespective of current, so this is an allowable connection.

7. The opposing capacity of materials against the current flow is
a) Conductance
b) Inductance
c) Susceptance
d) Resistance
View Answer

Answer: d
Explanation: The opposing capacity of materials against the current flow is resistance.

8. The conductance of a 923Ω resistance is
a) 1.08 * 10-3 mho
b) 1.08 * 10-4 mho
c) 1.02 * 10-3 mho
d) 1.02 * 10-4 mho
View Answer

Answer: a
Explanation: c=1/R =1/923 = 1.08 * 10-3 mho

9. The current passing through a circuit is 7.2A and the power at the terminals is 27 watts.
Existence is ___________ ohms.
a) 0.5402
b) 0.5208
c) 0.5972
d) 0.5792
View Answer

Answer: b
Explanation: p = vi
= (iR) i
= i2 R
R = P/i2
=27/ (7.2)2
= 0.5208Ω.

10. Relation between power, voltage and conductance
a) V = P2.G
b) V = P2/G
c) P = v2/G
d) P = V2 G
View Answer

Answer: d
Explanation: P = vi
= v (v/R)
= v2/R
= v2G.

Sanfoundry Global Education & Learning Series – Electric Circuits.

To practice all areas of Electric Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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