Explore topic-wise MCQs in Engineering.

This section includes 9294 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.

3201.

Insulation resistance of a cable is directly proportional to its length.

A. True
B. False
Answer» C.
Discussion
3202.

In the following circuit, i(t) under steady state is

A. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/134-871-2.png">
B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/134-871-3.png">
C. 0
D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/134-871-4.png">
Answer» C. 0
Discussion
3203.

The filter in figure, uses ideal op-amp. It is

A. low pass filter
B. high pass filter
C. band pass filter
D. band stop filter
Answer» B. high pass filter
Discussion
3204.

A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel. The new bandwidth will be

A. 200 rad/sec
B. more than 200 rad/sec
C. less than 200 rad/sec
D. 200 rad/sec or less
Answer» C. less than 200 rad/sec
Discussion
3205.

Assertion (A): The s domain impedance of a series R-L circuit is R + sL irrespective of initial conditions.Reason (R): Complex frequency s = + j .

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
3206.

A voltage v = 100 sin (100 pt + 45 ) V is applied to an impedance 10 + j10 ohm. The current is

A. 10 45 A
B. 7.07 45 A
C. 5 45 A
D. 5 0 A
Answer» E.
Discussion
3207.

For a rectified sinusoidal wave clipped at 0.707 its peak value (figure), the average value is

A. 70.7 V
B. 63.7 V
C. 54 V
D. 15 V
Answer» D. 15 V
Discussion
3208.

If Va = 10 0, Vb = 10 -120 and Vc = 10 -240 , then Va2 and Va0 are

A. 10 and 0 respectively
B. 0 and 10 respectively
C. 0 and 0
D. 10 and 10
Answer» B. 0 and 10 respectively
Discussion
3209.

A wire has a diameter d and resistance R. If the diameter is made 3d, the length and material remaining the same, the new value of resistance will be

A. R/3
B. 3 R
C. R/9
D. 9 R
Answer» D. 9 R
Discussion
3210.

The realization of a reactance function gives

A. a network having inductances only
B. a network having capacitances only
C. a network having resistances only
D. a network having inductances and capacitances only
Answer» D. a network having inductances and capacitances only
Discussion
3211.

The correct relation between energy and charge is

A. Energy = voltage/charge
B. Charge = Energy x voltage
C. Energy = voltage (charge)
D. <sup>0.5</sup>
E. Energy = voltage x charge
Answer» E. Energy = voltage x charge
Discussion
3212.

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

A. 8.062 29.7
B. 10 45
C. 2.236 243.43
D. 6.72 243.43
Answer» D. 6.72 243.43
Discussion
3213.

Resistivity of semiconductors is around 100 &amp;ohm;-m.

A. True
B. False
Answer» C.
Discussion
3214.

Two capacitors of 20 F each are in series. The total capacitance is

A. 5 F
B. 10 F
C. 40 F
D. 400 F
Answer» C. 40 F
Discussion
3215.

Thevenin's theorem is used to find current in a branch of a network. It is now desired to find current in another branch of the network

A. the same Thevenin's circuit can be used
B. the same Thevenin's circuit with some modification can be used
C. it is necessary to find new Thevenin's circuit
D. either (b) or (c)
Answer» D. either (b) or (c)
Discussion
3216.

In the circuit of figure the current through 5 &amp;ohm; resistance at t = is

A. 0 A
B. 10 A
C. 6.67 A
D. 5.1 A
Answer» B. 10 A
Discussion
3217.

In an infinite ladder Ckt as shown above each resistance of r&amp;ohm; then RAB

A.
B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/137-898-2.png">
C. 1.61 &ohm;
D. none
Answer» D. none
Discussion
3218.

A series resonant circuit has R = 2 &amp;ohm;, L = 0.1 H and C =10 F. At resonance applied voltage = 10 0 V. Voltage across inductance is likely to be

A. 10 0 V
B. 10 45 V
C. 100 90 V
D. 100 -90 V
Answer» D. 100 -90 V
Discussion
3219.

The admittance parameter Y12 in the 2 port network in the figure

A. -0.2 mho
B. 0.1 mho
C. -0.05 mho
D. 0.05 mho
Answer» C. -0.05 mho
Discussion
3220.

The VTH at terminals A and B is equal to

A. 0 V
B. 5 V
C. -5 V
D. none
Answer» C. -5 V
Discussion
3221.

Consider the followingIf a network has impedance (1 - j) at a specific frequency, the circuit would consists of series R and CR and LR, L and C Which of these statements is correct?

A. 1 and 2
B. 1 and 3
C. 1, 2 and 3
D. 2 and 3
Answer» E.
Discussion
3222.

Assertion (A): Power is the rate at which energy is supplied.Reason (R): Energy = VIt.

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» B. Both A and R are true and R is not the correct explanation of A
Discussion
3223.

The circuit in figure, the switched on at t = 0. After a long time the current through 5 &amp;ohm; resistance is

A. 1 A
B. 4 A
C. 10 A
D. 0
Answer» E.
Discussion
3224.

If sequence currents Ia1 = 2 - 90 , Ia2 = 0.2 90 and Ia3 = 1.8 90 , Ia =

A. 0
B. 1
C. 4
D. <span class="root">8</span>
Answer» D. <span class="root">8</span>
Discussion
3225.

If f(t) = - f(- t) and f(t) satisfies Dirichlet conditions, then f(t) can be expanded in Fourier series having

A. sine terms only
B. cosine terms only
C. cosine and constant terms
D. sine and constant term
Answer» B. cosine terms only
Discussion
3226.

For the R-L circuit shown in the figure, the input voltage vi(t) = U(t). The current i(t) is

A. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-974-2.png">
B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-974-3.png">
C. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-974-4.png">
D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-974-5.png">
Answer» D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-974-5.png">
Discussion
3227.

The equivalent inductance seen at terminals A - B is

A. 14 H
B. 20 H
C. 10 H
D. 4 H
Answer» B. 20 H
Discussion
3228.

In figure, the switch is closed at t = 0 when current through inductor is 6 A, the rate of change of current through resistor is 6 A/s. The value of L is

A. 1 H
B. 2 H
C. 3 H
D. 4 H
Answer» C. 3 H
Discussion
3229.

In figure, the switch is closed at t = 0. At t = 0+, di/dt = 4 A/s. Then V =

A. 10 V
B. 20 V
C. 40 V
D. 80 V
Answer» E.
Discussion
3230.

A source of angular frequency 1 rad sec has a source impedance consisting of 1 &amp;ohm; resistance in series with 1 H inductance. The load that will obtained the maximum power transfer is

A. 1 &ohm; resistance
B. 1 &ohm; resistance in parallel with 1 H inductance
C. 1 &ohm; resistance in series with 1 F capacitor
D. 1 &ohm; resistance in parallel with 1 F capacitor
Answer» D. 1 &ohm; resistance in parallel with 1 F capacitor
Discussion
3231.

When tracing through a resistance we always get a voltage drop.

A. True
B. False
Answer» C.
Discussion
3232.

A copper coil has a resistance of 40 ohm at 20 C. At 100 C the resistance is likely to be

A. 44 &ohm;
B. 54 &ohm;
C. 84 &ohm;
D. 104 &ohm;
Answer» C. 84 &ohm;
Discussion
3233.

When a source is delivering maximum power to a load through a network, the ratio of power delivered to the source power

A. may be 50% or less than 50%
B. is 50%
C. may be 50% or more than 50%
D. may be 50% or more less than 50%
Answer» B. is 50%
Discussion
3234.

Assertion (A): In a parallel circuit with three branches having R, L and C respectively and fed by a step current I, the current through inductance is always zero.Reason (R): The time constant of R-L circuit is L/R.

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
3235.

For the lattice circuit shown in the figure Za = j2 &amp;ohm; and Zb = 2 &amp;ohm;. The values of the open circuit impedance parameters Z = are

A. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-975-3.png">
B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-975-4.png">
C. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-975-5.png">
D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/141-975-6.png">
Answer» E.
Discussion
3236.

The current wave in figure is passed through 3 H inductor. The voltage across inductance during the period 2 &lt; t &lt; 3 seconds is

A. 12 V
B. - 12 V
C. 6 V
D. - 6 V
Answer» C. 6 V
Discussion
3237.

In figure, the charge on 0.8 F capacitor is

A. 100 C
B. 50 C
C. 40 C
D. 20 C
Answer» D. 20 C
Discussion
3238.

Maximum power transfer theorem finds application in

A. power circuits
B. distribution circuits
C. communication circuits
D. both power and communication circuits
Answer» D. both power and communication circuits
Discussion
3239.

In a series L-C circuit fed by ac voltage, voltage drops across L and C are 40 V and 30 V respectively. The supply voltage is

A. 70 V
B. 10 V
C. 50 V
D. 1.333 V
Answer» D. 1.333 V
Discussion
3240.

A parallel plate capacitor has plate area A and distance between the plates is d. It has two dielectrics each of thickness d and area 0.5 A. The dielectric constants are 1 and 2. The total capacitance is given by the equation

A. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/88-54-1.png">
B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/88-54-2.png">
C. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/88-54-3.png">
D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/88-54-4.png">
Answer» B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/88-54-2.png">
Discussion
3241.

Which of the following theorems can be conveniently used to find power consumed in 10 &amp;ohm; resistor in figure?

A. Thevenin theorem
B. Maximum power transfer theorem
C. Millman's theorem
D. Superposition theorem
Answer» E.
Discussion
3242.

The differential equation for the current i(t) in the Ckt is

A. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/136-894-2.png">
B. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/136-894-3.png">
C. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/136-894-4.png">
D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/136-894-5.png">
Answer» D. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/136-894-5.png">
Discussion
3243.

A 20 &amp;ohm; resistor, a 1H inductor and 1 F capacitor are connected in parallel the combination is driven by a unit step current. Under the steady state, source current flows through

A. inductor
B. capacitor
C. resistor
D. all
Answer» B. capacitor
Discussion
3244.

A series resonant circuit has parameters 10 , 1 H and 0.1 F. It is excited by a voltage v = 100 sin t. At resonant frequency, the power dissipated in the circuit is

A. 1000 W
B. 707 W
C. 500 W
D. 414.14 W
Answer» D. 414.14 W
Discussion
3245.

Assertion (A): A tree of graph contains all the nodes of the graph.Reason (R): The number of links is always less than the number of tree branches.

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
3246.

Cells are connected in series to increase

A. current-rating
B. both voltage and current rating
C. the life of cell
D. voltage rating
Answer» E.
Discussion
3247.

The low pass filter characteristic shown in figure realizable.

A. True
B. False
Answer» C.
Discussion
3248.

For a series RLC circuit bandwidth is 2 - 1 = R/2L.

A. True
B. False
Answer» C.
Discussion
3249.

If , the network has

A. 1 H inductor and 1 F capacitor in parallel
B. 1 H inductor and 1 F capacitor in series
C. 1 H inductor and 1 &ohm; resistor in series
D. 1 H inductor and 1 &ohm; resistor in parallel
Answer» C. 1 H inductor and 1 &ohm; resistor in series
Discussion
3250.

An RL impedance function can also be realized as

A. RC impedance function
B. RC admittance function
C. LC impedance function
D. LC admittance function
Answer» C. LC impedance function
Discussion