Circuit Theory Objective Questions: Part2

Circuit Theory Objective Questions: Part2

ELECTRICAL CIRCUITS OBJECTIVE QUESTIONS FROM COMPETITIVE EXAMS:

[1] A reactance network in the Foster's I form has poles at  ω=∞(infinity). The element in box-1 in the above network is  [IES2010]

A. a capacitor
B. an inductor
C. a parallel LC circuit
D. a series LC circuit

Ans: D

 

Statement for Linked Answer Questions 2 and 3: [GATE 2009]

[2] For the circuit given above, the Thevinin's resistance across the terminals A and B is [GATE 2009]

A. 0.5kΩ

C. 1kΩ

D. 0.11kΩ

Ans: B

[3] For the circuit given above, the Thevenin's voltage across the terminals A and B is 

[GATE 2009]

A. 1.25V

B. 0.25V

C. 1V

D. 0.5V

Ans:D

[4] For the circuit shown, find out the current flowing through the 2Ω resistance. Also identify the changes to be made to double the current through the 2Ω resistance.  [GATE]

A. (5A;Put Vs=20V)

B. (2A;Put Vs=8V)

C. (5A;Put Vs=10A)

D. (7A;Put Vs=12A)

Ans: B

[5] The common emitter forward current gain of the transistor shown is 100. The transistor is operating in [GATE 2007]

A. Saturation Region
B. Cutoff Region
C. Reverse active region
D. Forward active region

Ans:

[6] The three – terminal linear voltage regulator is connected to a 10 ohm load resistor as shown in the figure. If Vin is 10V, what is the power dissipated in the transistor [GATE 2007]

     A. 0.6W

B. 2.4W

C. 4.2W

D. 5.4W

Ans: B

LINKED ANSWER QUESTIONS: Q.7 to Q.8 

Carry Two Marks Each Statement for Linked Answer Questions:7 & 8

In the circuit shown, the three voltmeter readings are V₁=220V, V₂=122V, V₃=136V

[7]  The power factor of the load is  [GATE2012]

        a. 0.45

        b. 0.50

        c. 0.55

        d. 0.60

Ans: A

[8]  If R_L=5Ω, the approximate power consumption in the load is  [GATE2012]

        a. 700W

        b. 750W

        c. 800W

        d. 850W

Ans:B

Common Data Questions: 9&10

With 10V dc connected at port A in the linear nonreciprocal two-port network shown below,following were observed:

        (1)1Ω connected at port B draws a current of 3A

        (2) 2.5Ω connected at port B draws a current of 2A

[9] For the same network, with 6V dc connected at port A, 1Ω connected at port B draws 7/3 A. If 8V dc is connected to port A, the open circuit voltage at port B is  [GATE2012]

        a. 6V

        b. 7V

        c. 8V

        d. 9V

Ans: C

[10]  With 10V dc connected at port A, the current drawn 7Ω connected at port B is  [GATE2012] a. 3/7A
b. 5/7A
c. 1A
d. 9/7A

Ans:C

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