9294 + Mcqs in Electronics and Communication Engineering Page 99 McqOptions

4901.	The fourier transform of a double sided exponential function is
A.	<img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/10-03-37-1.png">
B.	<img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/10-03-37-2.png">
C.	<img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/10-03-37-3.png">
D.	<img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/10-03-37-4.png">
Answer» E.

Discussion

4902.	The number of product terms in the minimized sum of product expression obtained through the following k map is (where "d" denotes don't care states)
A.	2
B.	3
C.	4
D.	5
Answer» C. 4

Discussion

4903.	Find RAB
A.	1
B.	<img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-04-54-2.png">
C.	<img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-04-54-3.png">
D.	2
Answer» E.

Discussion

4904.	In figure, a voltmeter of internal resistance 1200 &ohm; is connected across 600 &ohm; resistance and it reads 5 V. The value of R is
A.	1200 &ohm;
B.	2400 &ohm;
C.	3600 &ohm;
D.	7200 &ohm;
Answer» C. 3600 &ohm;

Discussion

4905.	For the wave shown in figure, the average and rms values are
A.	50 A and 57.73 A
B.	57.73 A and 50 A
C.	25 A and 57.73 A
D.	57.73 A and 70.7 A
Answer» B. 57.73 A and 50 A

Discussion

4906.	When a 10 K, 10%, 1/4 &ohm; resistor is connected in series with a 12 K, 1%, 1/4 &ohm; resistor, the resulting combination has the following specifications
A.	22 K, 11%, 1/2 &ohm;
B.	22 K, 5.5%, 1/2 &ohm;
C.	22 K, 5.5%, 1/8 &ohm;
D.	none of these
Answer» C. 22 K, 5.5%, 1/8 &ohm;

Discussion

4907.	The network has 10 nodes and 17 branches. The number of different node power voltages would be
A.	7
B.	9
C.	10
D.	45
Answer» C. 10

Discussion

4908.	For the time domain response shown in figure the pole
A.	lies in left half plane
B.	lies on imaginary axis
C.	lies along the positive real axis
D.	may be complex or imaginary
Answer» D. may be complex or imaginary

Discussion

4909.	Two capacitor of 1 F each are connected in parallel. Another 1 F capacitor is connected in series with the parallel combination. The total capacitance is
A.	3 F
B.	2 F
C.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/107-452-1.png">
D.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/107-452-2.png">
Answer» D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/107-452-2.png">

Discussion

4910.	The realization of the term Ks yields
A.	a resistance of value K ohms
B.	a capacitances of value K farads
C.	an inductance of value k farads
D.	either (b) or (c)
Answer» D. either (b) or (c)

Discussion

4911.	If operator 'a' = 1 120 then (1 - a2) =
A.	1 - 30
B.	1 30
C.	1 - 60
D.	1 60
Answer» B. 1 30

Discussion

4912.	If A = 3 + j1 and B = 4 + j3, A + B =
A.	7 45
B.	10 45
C.	8.062 29.7
D.	8.062 73
Answer» D. 8.062 73

Discussion

4913.	When a constant voltage source and constant current source are in series, the current source is ineffective.
A.	True
B.	False
Answer» C.

Discussion

4914.	Identify which of the following is not a tree of the graph shown in figure
A.	<i>bcgh</i>
B.	<i>defg</i>
C.	<i>abfg</i>
D.	<i>aegh</i>
Answer» D. <i>aegh</i>

Discussion

4915.	A system has transfer function The dc gain is
A.	1
B.	2
C.	5
D.	10
Answer» D. 10

Discussion

4916.	The response of a network is shown in figure. Which of following represents location of poles?
A.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/121-683-2.png">
B.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/121-683-3.png">
C.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/121-683-4.png">
D.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/121-683-5.png">
Answer» E.

Discussion

4917.	In figure, the short circuit current through terminal AB will be
A.	1.5 A
B.	3 A
C.	2 A
D.	1 A
Answer» E.

Discussion

4918.	Two capacitors of 16 F each are connected in series. Another capacitor of 16 F is connected in parallel with this combination. The total capacitance will be
A.	48 F
B.	32 F
C.	24 F
D.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/89-66-1.png">
Answer» D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/89-66-1.png">

Discussion

4919.	If A = 3 + j1, A4
A.	100 18.43
B.	100 73.72
C.	10 18.43
D.	10 73.72
Answer» C. 10 18.43

Discussion

4920.	Assertion (A): Operator has a value 1 - 90 or 1 90 .Reason (R): Operator 'a' has a value 1 120 .
A.	Both A and R are true and R is correct explanation of A
B.	Both A and R are true and R is not the correct explanation of A
C.	A is true but R is false
D.	A is false but R is true
Answer» E.

Discussion

4921.	For the two port of figure, z22 is
A.	26/7 &ohm;
B.	6/7 &ohm;
C.	2/3 &ohm;
D.	1 &ohm;
Answer» C. 2/3 &ohm;

Discussion

4922.	The internal impedance of a source is 3 + j 4 &ohm;. It is desired to supply maximum power to a resistive load. The load resistance should be
A.	3 &ohm;
B.	4 &ohm;
C.	7 &ohm;
D.	5 &ohm;
Answer» E.

Discussion

4923.	A wave trap is a
A.	series tuned circuit
B.	a parallel tuned circuit
C.	either a series tuned circuit or parallel tuned circuit
D.	none of the above
Answer» C. either a series tuned circuit or parallel tuned circuit

Discussion

4924.	In an ac series RLC circuit the maximum phase difference between any two voltages can be
A.	90
B.	45
C.	- 90
D.	180
Answer» E.

Discussion

4925.	In a series circuit with XL constant and R variable the current locus lies in the third quadrant.
A.	True
B.	False
Answer» C.

Discussion

4926.	In the circuit of figure the switch is closed at t = 0, At t = 0+ this current through inductance is
A.	0
B.	10 A
C.	6.67 A
D.	5.1 A
Answer» B. 10 A

Discussion

4927.	In the circuit of figure, the source supplies, 2.25 mA. The value of R must be
A.	5 &ohm;
B.	3 &ohm;
C.	1.5 &ohm;
D.	0.5 &ohm;
Answer» C. 1.5 &ohm;

Discussion

4928.	The sum of positive real functions
A.	is a positive real function
B.	may be a positive real function or not
C.	can not be a positive real function
D.	either (b) or (c)
Answer» D. either (b) or (c)

Discussion

4929.	Twelve 1 &ohm; resistance are used as edges to form a cube. The resistance between two diagonally opposite corners of the cube is
A.	5/6 &ohm;
B.	1 &ohm;
C.	6/5 &ohm;
D.	3/2 &ohm;
Answer» B. 1 &ohm;

Discussion

4930.	A parallel RLC circuit has 0 = 106 and Q = 30, Given C = 30 pF, the value of R is
A.	0
B.	1 &ohm;
C.	2 M&ohm;
D.	1 M&ohm;
Answer» E.

Discussion

4931.	If the p and T circuits in figure are equivalent, then R1, R2, R3 respectively are
A.	9 &ohm;, 6 &ohm;, 6 &ohm;
B.	6 &ohm;, 6 &ohm;, 9 &ohm;
C.	9 &ohm;, 6 &ohm;, 9 &ohm;
D.	6 &ohm;, 9 &ohm;, 6 &ohm;
Answer» C. 9 &ohm;, 6 &ohm;, 9 &ohm;

Discussion

4932.	Assertion (A): The Laplace transform of a ramp is 1/s2.Reason (R): The integral of a unit step function gives an impulse function.
A.	Both A and R are true and R is correct explanation of A
B.	Both A and R are true and R is not the correct explanation of A
C.	A is true but R is false
D.	A is false but R is true
Answer» D. A is false but R is true

Discussion

4933.	In an R-L circuit, the impedance is 30 &ohm; at a frequency of 100 Hz. At 200 Hz, the impedance should be
A.	30 &ohm; or more
B.	60 &ohm; or more
C.	15 &ohm; or less
D.	more than 30 &ohm; but less than 60 &ohm;
Answer» E.

Discussion

4934.	A choke coil has a resistance to reactance ratio of 0.2. The power factor of the choke coil is
A.	less than 0.2 lagging
B.	less than 0.2 leading
C.	about 1
D.	about 0
Answer» B. less than 0.2 leading

Discussion

4935.	Two capacitors of 1 F and 2 F are connected in series across a 10 V dc battery. After the capacitors have been charged, the charges across the two capacitors will be
A.	10 C each
B.	20 C each
C.	10 C and 20 C
D.	20 C and 10 C
Answer» C. 10 C and 20 C

Discussion

4936.	A series RLC circuit has Q = 5. A voltage of 10 V rms is applied to it. At resonance, the voltage across C is
A.	10 V rms
B.	10 V peak
C.	50 V rms
D.	50 V peak
Answer» D. 50 V peak

Discussion

4937.	v-i relation for a capacitor is
A.	True
B.	False
Answer» B. False

Discussion

4938.	A 60 W, 23 V bulb is used for 45 minutes. The electrical energy consumed in commercial units is
A.	2700 units
B.	0.45 units
C.	4.5 units
D.	0.045 units
Answer» E.

Discussion

4939.	The time constant of the circuit in figure is
A.	6 sec
B.	10 sec
C.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/124-711-2.png">
D.	16 sec
Answer» D. 16 sec

Discussion

4940.	The damping coefficient for the given circuit is __________
A.	1/2
B.	1/4
C.	2
D.	1
Answer» B. 1/4

Discussion

4941.	In an ideal current source, the source resistance is zero.
A.	True
B.	False
Answer» C.

Discussion

4942.	In figure, the steady state current through 1H inductance is
A.	Zero
B.	3 A
C.	5 A
D.	6 A
Answer» C. 5 A

Discussion

4943.	The strength of controlled voltage source depends on
A.	value of current elsewhere in the circuit
B.	value of voltage elsewhere in the circuit
C.	value of current or voltage elsewhere in the circuit
D.	none of the above
Answer» D. none of the above

Discussion

4944.	In figure, the value of R should be
A.	0.2 &ohm;
B.	0.1 &ohm;
C.	0.05 &ohm;
D.	0.1 &ohm;
Answer» C. 0.05 &ohm;

Discussion

4945.	The current voltage relation for an inductance L is
A.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/106-429-1.png">
B.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/106-429-2.png">
C.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/106-429-3.png">
D.	<img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/106-429-4.png">
Answer» B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/106-429-2.png">

Discussion

4946.	A band elimination constant k filter has series resonant circuit in series arms.
A.	True
B.	False
Answer» C.

Discussion

4947.	If e = 110 sin ( t + p/3) and i = 5 sin ( t - p/3), the impedance of the circuit is
A.	22 &ohm;
B.	16 &ohm;
C.	30.8 &ohm;
D.	11 &ohm;
Answer» B. 16 &ohm;

Discussion

4948.	Ohm's law is valid for
A.	dc voltage and current
B.	ac voltage and current
C.	all voltages and current
D.	dc and ac voltages and currents
Answer» D. dc and ac voltages and currents

Discussion

4949.	In figure the open circuit emf is
A.	15 V
B.	1.45 V
C.	1.475 V
D.	1.485 V
Answer» D. 1.485 V

Discussion

4950.	In a practical current source, the load current
A.	is always equal to source current
B.	is always less than source current
C.	is always equal to or less than source current
D.	cannot be higher than source current
Answer» C. is always equal to or less than source current

Discussion

Explore topic-wise MCQs in Engineering.

The fourier transform of a double sided exponential function is

The number of product terms in the minimized sum of product expression obtained through the following k map is (where "d" denotes don't care states)

Find RAB

In figure, a voltmeter of internal resistance 1200 &amp;ohm; is connected across 600 &amp;ohm; resistance and it reads 5 V. The value of R is

For the wave shown in figure, the average and rms values are

When a 10 K, 10%, 1/4 &amp;ohm; resistor is connected in series with a 12 K, 1%, 1/4 &amp;ohm; resistor, the resulting combination has the following specifications

The network has 10 nodes and 17 branches. The number of different node power voltages would be

For the time domain response shown in figure the pole

Two capacitor of 1 F each are connected in parallel. Another 1 F capacitor is connected in series with the parallel combination. The total capacitance is

The realization of the term Ks yields

If operator 'a' = 1 120 then (1 - a2) =

If A = 3 + j1 and B = 4 + j3, A + B =

When a constant voltage source and constant current source are in series, the current source is ineffective.

Identify which of the following is not a tree of the graph shown in figure

A system has transfer function The dc gain is

The response of a network is shown in figure. Which of following represents location of poles?

In figure, the short circuit current through terminal AB will be

Two capacitors of 16 F each are connected in series. Another capacitor of 16 F is connected in parallel with this combination. The total capacitance will be

If A = 3 + j1, A4

Assertion (A): Operator has a value 1 - 90 or 1 90 .Reason (R): Operator 'a' has a value 1 120 .

For the two port of figure, z22 is

The internal impedance of a source is 3 + j 4 &amp;ohm;. It is desired to supply maximum power to a resistive load. The load resistance should be

A wave trap is a

In an ac series RLC circuit the maximum phase difference between any two voltages can be

In a series circuit with XL constant and R variable the current locus lies in the third quadrant.

In the circuit of figure the switch is closed at t = 0, At t = 0+ this current through inductance is

In the circuit of figure, the source supplies, 2.25 mA. The value of R must be

The sum of positive real functions

Twelve 1 &amp;ohm; resistance are used as edges to form a cube. The resistance between two diagonally opposite corners of the cube is

A parallel RLC circuit has 0 = 106 and Q = 30, Given C = 30 pF, the value of R is

If the p and T circuits in figure are equivalent, then R1, R2, R3 respectively are

Assertion (A): The Laplace transform of a ramp is 1/s2.Reason (R): The integral of a unit step function gives an impulse function.

In an R-L circuit, the impedance is 30 &amp;ohm; at a frequency of 100 Hz. At 200 Hz, the impedance should be

A choke coil has a resistance to reactance ratio of 0.2. The power factor of the choke coil is

Two capacitors of 1 F and 2 F are connected in series across a 10 V dc battery. After the capacitors have been charged, the charges across the two capacitors will be

A series RLC circuit has Q = 5. A voltage of 10 V rms is applied to it. At resonance, the voltage across C is

v-i relation for a capacitor is

A 60 W, 23 V bulb is used for 45 minutes. The electrical energy consumed in commercial units is

The time constant of the circuit in figure is

The damping coefficient for the given circuit is __________

In an ideal current source, the source resistance is zero.

In figure, the steady state current through 1H inductance is

The strength of controlled voltage source depends on

In figure, the value of R should be

The current voltage relation for an inductance L is

A band elimination constant k filter has series resonant circuit in series arms.

If e = 110 sin ( t + p/3) and i = 5 sin ( t - p/3), the impedance of the circuit is

Ohm's law is valid for

In figure the open circuit emf is

In a practical current source, the load current

In figure, a voltmeter of internal resistance 1200 &ohm; is connected across 600 &ohm; resistance and it reads 5 V. The value of R is

When a 10 K, 10%, 1/4 &ohm; resistor is connected in series with a 12 K, 1%, 1/4 &ohm; resistor, the resulting combination has the following specifications

The internal impedance of a source is 3 + j 4 &ohm;. It is desired to supply maximum power to a resistive load. The load resistance should be

Twelve 1 &ohm; resistance are used as edges to form a cube. The resistance between two diagonally opposite corners of the cube is

In an R-L circuit, the impedance is 30 &ohm; at a frequency of 100 Hz. At 200 Hz, the impedance should be