Network Theory Mcqs

Q:

The short-circuit admittance matrix of a two port network is as follows.
[0; -0.5; 0.5; 0]
Then the 2 port network is ____________

A) Non-reciprocal and passive B) Non-reciprocal and active
C) Reciprocal and passive D) Reciprocal and active
 
Answer & Explanation Answer: B) Non-reciprocal and active

Explanation: Not available for this question

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509
Q:

Pick the incorrect statement among the following.

A) Inductor is a passive element B) Current source is an active element
C) Resistor is a passive element D) Voltage source is a passive element
 
Answer & Explanation Answer: B) Current source is an active element

Explanation: Energy sources(voltage or current sources) are active elements, capable of delivering power to some external device.

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294
Q:

A constant current source supplies a electric current of 200 mA to a load of 2k?. When the load changed to 100?, the load current will be ___________

A) 9mA B) 4A
C) 700mA D) 12A
 
Answer & Explanation Answer: B) 4A

Explanation: From Ohm’s law, resistance is inversely proportional to the current.

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286
Q:

Given two mutually coupled coils have a total inductance of 1500 mH, the self-inductance of each coils if the coefficient of coupling is 0.2 is ____________

A) 325 mH B) 255 mH
C) 625 mH D) 550 mH
 
Answer & Explanation Answer: C) 625 mH

Explanation: Not available for this question

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247
Q:

A circuit tuned to a frequency of 1.5 MHz and having an effective capacitance of 150 pF. In this circuit, the current falls to 70.7 % of its resonant value. The frequency deviates from the resonant frequency by 5 kHz. Q factor is?

A) 50 B) 100
C) 150 D) 200
 
Answer & Explanation Answer: C) 150

Explanation: Not available for this question

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245
Q:

The number of branches incident at the node of a graph is called?

A) degree of the node B) order of the node
C) status of the node D) number of the node
 
Answer & Explanation Answer: A) degree of the node

Explanation: Nodes can be incident to one or more elements. The number of branches incident at the node of a graph is called degree of the node.

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243
Q:

A semiconductor diode is an ____________ element.

A) Bilateral B) Unilateral
C) Active D) Passive
 
Answer & Explanation Answer: B) Unilateral

Explanation: In semiconductor diode, current flows through the diode only in one direction. Hence, it is a unilateral element.

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239
Q:

A voltage source of 300 V has internal resistance of 4? and supplies a load having the same resistance. The power absorbed by the load is?

A) 1150 W B) 1250 W
C) 5625 W D) 5000 W
 
Answer & Explanation Answer: C) 5625 W

Explanation: Power absorbed = I²R.

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234