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
(e) None of the above

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
(e) None of the above

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
(e) None of the above

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)
(e) None of the above

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
(e) None of the above

Ans: D

[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

(e) None of the above

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
(e) None of the above

Ans: A

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

(a) 700W

(b) 750W

(c) 800W

(d) 850W
(e) None of the above

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
(e) None of the above

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
(e) None of the above

Ans:C