Basic Electrical Engineering Solved Objective Questions 4
Basic Electrical Engineering Solved Objective Questions from Competitive Exams
[1]Consider the following statements: [IES2010]
Piezoelectric materials serve as
1.A source of ultrasonic waves
2.When electric field is applied, the mechanical dimensions of the substances are not at all altered.
3.Converts electrical energy to mechanical and vice versa
4.Converts thermal energy to electrical energy
Which of the above statements is/are correct?
A.1 only
B.2 and 3 only
C.1 and 3 only
D.1,2,3 and 4
[2]The current through the 2KΩ resistance in the circuit shown is [GATE2009]
[6]In the figure shown, all elements used are ideal. For time t<0, S1 remained closed and S2 open. At t=0, S1 is opened and S2 is closed. If the voltage Vc2 across the capacitor C2 at t=0 is zero, the voltage across the capacitor combination at t=0+ will be
A. 1V
[7]Transformer and emitter follower can both be used for impedance matching at the output of an audio amplifier. The basic relationship between the input power Pin and output power Pout in both the cases is
[8]The equivalent capacitance of the input loop of the circuit shown is
A. 2μF
[1]Consider the following statements: [IES2010]
Piezoelectric materials serve as
1.A source of ultrasonic waves
2.When electric field is applied, the mechanical dimensions of the substances are not at all altered.
3.Converts electrical energy to mechanical and vice versa
4.Converts thermal energy to electrical energy
Which of the above statements is/are correct?
A.1 only
B.2 and 3 only
C.1 and 3 only
D.1,2,3 and 4
[2]The current through the 2KΩ resistance in the circuit shown is [GATE2009]
A.0 mA
B.1 mA
C.2 mA
D.6 mA
[3]Out of the following plant categories
1.Nuclear
2.Run-of-river
2.Run-of-river
3.Pump storage
4.Diesel
4.Diesel
the base load power plants are [GATE2009]
A.1 and 2
B. 2 and 3
C.1,2 and 4
D.1, 3,and 4
[4]The following circuit has a source voltage Vs as shown in the graph. The current through the circuit is also shown
The element connected between a and b could be
Ans:A
Each Question Carries Two Marks Each
[5]The following circuit has R= 10kΩ , C=10μF. The input voltage is a sinusoid at 50Hz with an rms value of 10V. Under ideal conditions, the current is from the source is [GATE 2009]
B. 20π mA leading by 90°
C. 10π mA leading by 90°
D. 10πmA lagging by 90°
Ans: A
[6]In the figure shown, all elements used are ideal. For time t<0, S1 remained closed and S2 open. At t=0, S1 is opened and S2 is closed. If the voltage Vc2 across the capacitor C2 at t=0 is zero, the voltage across the capacitor combination at t=0+ will be
B. 2V
C. 1.5V
D. 3 V
Ans: D
[7]Transformer and emitter follower can both be used for impedance matching at the output of an audio amplifier. The basic relationship between the input power Pin and output power Pout in both the cases is
A. Pin = Pout for both transformer and emitter follower
B. Pin > Pout for both transformer and emitter follower
C. Pin < Pout for transformer and Pin = Pout for emitter follower
D. Pin = Pout for transformer and Pin < Pout for emitter follower
Ans: None of the above
[8]The equivalent capacitance of the input loop of the circuit shown is
A. 2μF
B. 100μF
C. 200μF
D. 4μF
Ans:A
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