This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Sources and Some Definitions”.
1. Source is a basic network element which supplies power to the networks.
a) True
b) False
View Answer
Explanation: The basic network element which supplies energy to the networks is Source. Hence, it is true.
2. The dependent sources are of _____________ kinds.
a) 5
b) 2
c) 3
d) 4
View Answer
Explanation: The dependent sources are of four kinds, depending on whether the control variable is voltage or current and the controlled source is a voltage source or current source. They are VCVS, VCCS, CCVS and CCCS.
3. The constant gm has dimension of ___________
a) Ampere per volt
b) Ampere
c) Volt
d) Volt per ampere
View Answer
Explanation: Transconductance is the ratio of current to voltage. Hence, the constant gm has a dimension of ampere per volt or siemens (S).
4. In CCVS, voltage depends on the control current and the constant called __________
a) Transconductance
b) Transresistance
c) Current Gain
d) Voltage Gain
View Answer
Explanation: In CCVS, voltage is directly proportional to the control current. The constant of proportionality is called Transresistance(r).
V = ri.
5. Every circuit is a network, but all networks are not circuits.
a) True
b) False
View Answer
Explanation: The interconnection of two or more circuit elements is called a Network. If the network contains at least one closed path, it is called a Circuit.
6. Which of the following is not an example of a linear element?
a) Resistor
b) Thermistor
c) Inductor
d) Capacitor
View Answer
Explanation: If the resistance, inductance or capacitance offered by an element does not change linearly with the change in applied voltage or circuit current, the element is termed as a linear element. Resistor, Inductor and Capacitor are examples of linear elements. Thermistor is an example of Non-Linear element.
7. Find the odd one out.
a) Resistor
b) Voltage-dependent resistor(VDR)
c) Temperature-dependent resistor(Thermistor)
d) Light-dependent resistor(LDR)
View Answer
Explanation: A non-linear circuit element is one in which the current does not change linearly with the change in applied voltage. Examples of non-linear elements are VDR, thermistor and LDR. Hence resistor is the odd one.
8. Which of the following is an Active element?
a) Resistor
b) Inductor
c) Capacitor
d) OP-AMP
View Answer
Explanation: OP-AMP is an active element because it can be used for the amplification or generation of signals. All the other circuit elements are passive elements.
9. A semiconductor diode is an ____________ element.
a) Bilateral
b) Unilateral
c) Active
d) Passive
View Answer
Explanation: In semiconductor diode, current flows through the diode only in one direction. Hence, it is a unilateral element.
10. Example of distributed element is ___________
a) Resistor
b) Thermistor
c) Semiconductor diode
d) Transmission lines
View Answer
Explanation: Distributed elements are those which are not separable for analysis purposes. Examples of distributed elements are transmission lines in which the resistance, inductance and capacitance are distributed along its length.
Sanfoundry Global Education & Learning Series – Network Theory.
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