## 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

[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

[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
[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
[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

[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

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

[8]  If RL=5Ω, the approximate power consumption in the load is  [GATE2012]
(a) 700W
(b) 750W
(c) 800W
(d) 850W
(e) None of the above
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

[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

5:59 PM

1. Qn No.2, Answer is 0.2Kohms

2. For maximum depth, use lower frequencies.

3. For maximum depth, use reduced frequencies.