Network Theory Multiple Choice Questions on “Sources and Some Definitions”.
1. Source is a basic network element which supplies power to the networks.
A. True
B. False
Answer: B
Clarification: 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
Answer: D
Clarification: 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
Answer: A
Clarification: 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
Answer: B
Clarification: 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
Answer: A
Clarification: 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
Answer: B
Clarification: 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)
Answer: A
Clarification: 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
Answer: D
Clarification: 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
Answer: B
Clarification: 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
Answer: D
Clarification: 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.