R4RIN – MCQs, Mock Tests | Electrical engineering Network Theory Set-7

The scale factor is denoted by the letter?

1. G
2. H
3. I
4. J

✅ Correct Answer: 2

The zeros in the transfer function are denoted by?

1. 3
2. 2
3. 1
4. 0

✅ Correct Answer: 4

The poles in the transfer function are denoted by?

1. x
2. y
3. z
4. w

✅ Correct Answer: 1

The network function N (S) becomes _________ when s is equal to anyone of the zeros.

1. 1
2. 2
3. 0
4. ∞

✅ Correct Answer: 3

The N (S) becomes ________ when s is equal to any of the poles.

1. ∞
2. 0
3. 1
4. 2

✅ Correct Answer: 1

If the poles or zeros are not repeated, then the function is said to be having __________ poles or ________ zeros.

1. simple, multiple
2. multiple, simple
3. simple, simple
4. multiple, multiple

✅ Correct Answer: 3

If the poles or zeros are repeated, then the function is said to be having __________ poles or ________ zeros.

1. multiple, multiple
2. simple, simple
3. multiple, simple
4. simple, multiple

✅ Correct Answer: 1

If the number of zeros (n) are greater than the number of poles (m), then there will be _________ number of zeros at s = ∞.

1. n
2. m
3. n-m
4. n+m

✅ Correct Answer: 3

If the number of poles (m) are greater than the number of zeros (n), then there will be _________ number of zeros at s = ∞.

1. m+n
2. m-n
3. m
4. n

✅ Correct Answer: 2

The driving point function is the ratio of polynomials in s. Polynomials are obtained from the __________ of the elements and their combinations.

1. transform voltage
2. transform current
3. transform impedance
4. transform admittance

✅ Correct Answer: 3

The pole is that finite value of S for which N (S) becomes __________

1. 0
2. 1
3. 2
4. ∞

✅ Correct Answer: 4

A function N (S) is said to have a pole (or zero) at infinity if the function N (1/S) has a pole (or zero) at S = ?

1. ∞
2. 2
3. 0
4. 1

✅ Correct Answer: 3

The number of zeros including zeros at infinity is __________ the number of poles including poles at infinity.

1. greater than
2. equal to
3. less than
4. greater than or equal to

✅ Correct Answer: 2

The poles of driving point impedance are those frequencies corresponding to ___________ conditions.

1. short circuit
2. voltage source
3. open circuit
4. current source

✅ Correct Answer: 3

The zeros of driving point impedance are those frequencies corresponding to ___________ conditions.

1. current source
2. open circuit
3. voltage source
4. short circuit

✅ Correct Answer: 4

In the driving point admittance function, a zero of Y (s) means a _______ of I (S).

1. 1
2. 2
3. 3
4. zero

✅ Correct Answer: 4

In the driving point admittance function, a pole of Y (s) means a _______ of V (S).

1. zero
2. 1
3. 2
4. 3

✅ Correct Answer: 1

The real part of all zeros and poles must be?

1. positive or zero
2. negative or zero
3. positive
4. negative

✅ Correct Answer: 2

Poles or zeros lying on the jω axis must be?

1. complex
2. at least one complex pole
3. at least one complex zero
4. simple

✅ Correct Answer: 4

The coefficients of numerator polynomial and the denominator polynomial in a transfer function must be?

1. real
2. complex
3. at least one real coefficient
4. at least one complex coefficient

✅ Correct Answer: 1

In a transfer function, the degree of numerator polynomial is ___________ than the degree of the denominator polynomial.

1. greater than
2. less than
3. equal to
4. less than or equal to

✅ Correct Answer: 4

The real parts of all poles and zeros in a driving point function must be?

1. zero
2. negative
3. zero or negative
4. positive

✅ Correct Answer: 3

If the real part of driving point function is zero, then the pole and zero must be?

1. complex
2. simple
3. one complex pole
4. one complex zero

✅ Correct Answer: 2

Two ports containing no sources in their branches are called?

1. active ports
2. passive ports
3. one port
4. three port

✅ Correct Answer: 2

Two ports containing sources in their branches are called?

1. three port
2. one port
3. passive ports
4. active ports

✅ Correct Answer: 4

The short-circuit admittance matrix of a two port network is as follows. [0; -0.5; 0.5; 0] Then the 2 port network is ____________

1. Non-reciprocal and passive
2. Non-reciprocal and active
3. Reciprocal and passive
4. Reciprocal and active

✅ Correct Answer: 2

A network is said to be symmetrical if the relation between A and D is?

1. A = D
2. A = 2 D
3. A = 3 D
4. A = 4 D

✅ Correct Answer: 1

How many incandescent lamps connected in series would consume the same total power as a single 100 W/220 V incandescent lamp. The rating of each lamp is 200 W/220 V?

1. Not possible
2. 4
3. 3
4. 2

✅ Correct Answer: 4

Two networks are connected in series parallel connection. Then, the forward short-circuit current gain of the network is ____________

1. Product of Z-parameter matrices
2. Sum of h-parameter matrices
3. Sum of Z-parameter matrices
4. Product of h-parameter matrices

✅ Correct Answer: 2

The relation AD – BC = 1, (where A, B, C and D are the elements of a transmission matrix of a network) is valid for ___________

1. Both active and passive networks
2. Passive but not reciprocal networks
3. Active and reciprocal networks
4. Passive and reciprocal networks

✅ Correct Answer: 4

For a 2 port network, the transmission parameters are given as 10, 9, 11 and 10 corresponds to A, B, C and D. The correct statement among the following is?

1. Network satisfies both reciprocity and symmetry
2. Network satisfies only reciprocity
3. Network satisfies only symmetry
4. Network satisfies neither reciprocity nor symmetry

✅ Correct Answer: 1

If for a circuit the value of the h parameter is given as h = [8, 2/3; -2/3, 4/9]. Then the value of the voltage source V is _________________

1. 2.38 V
2. 1.19 V
3. 1.6 V
4. 3.2 V

✅ Correct Answer: 2

A periodic voltage v (t) = 1 + 4 sin ωt + 2 cos ωt is applied across a 1Ω resistance. The power dissipated is ____________

1. 1 W
2. 11 W
3. 21 W
4. 24.5 W

✅ Correct Answer: 2

Permeability is analogous to _____________

1. Conductivity
2. Resistivity
3. Retentivity
4. Coercivity

✅ Correct Answer: 1

A resistance and an inductance are connected in parallel and fed from 50 Hz ac mains. Each branch takes a current of 5 A. The current supplied by source is ____________

1. 10 A
2. 7.07 A
3. 5 A
4. 0 A

✅ Correct Answer: 2

A triangular Pulse of 50 V peak is applied to a capacitor of 0.1 F. The change of the capacitor and its waveform shape is ___________

1. 10 rectangular
2. 5 rectangular
3. 5 triangular
4. 10 triangular

✅ Correct Answer: 3

A 10 μF capacitor is charged from a 5 volt source through a resistance of 10 kΩ. The charging current offer 35 m sec. If the initial voltage on C is – 3 V is ___________

1. 0.56 mA
2. 5.6 mA
3. 6 mA
4. 5 μA

✅ Correct Answer: 1

If the diameter of a wire is doubled, the current carrying capacity of the wire is ___________

1. Half
2. Twice
3. Four times
4. One-fourth

✅ Correct Answer: 3

Consider an RL series circuit having resistance R = 3 Ω, inductance L = 3 H and is excited by 6V. The current after a long time after closing of switch is ____________

1. 1 A
2. 2 A
3. 0 A
4. Infinity

✅ Correct Answer: 2

The energy stored in a coil is 108 J. The power dissipated instantaneously across the blades of switch after it is opened in 10 ms is ____________

1. 108 W
2. 1080 W
3. 10800 W
4. 108000 W

✅ Correct Answer: 3

Barletts Bisection Theorem is applicable to ___________

1. Unsymmetrical networks
2. Symmetrical networks
3. Both unsymmetrical and symmetrical networks
4. Neither to unsymmetrical nor to symmetrical networks

✅ Correct Answer: 2

The Thevenin’s equivalent of a network is a 10 V source in series with 2 Ω resistances. If a 3 Ω resistance is connected across the Thevenin’s equivalent is _____________

1. 10 V in series with 1.2 Ω resistance
2. 6 V in series with 1.2 Ω resistance
3. 10 V in series with 5 Ω resistance
4. 6 V in series with 5 Ω resistance

✅ Correct Answer: 2

Two coils X and Y have self-inductances of 5 mH and 10 mH and mutual inductance of 3 mH. If the current in coils X change at a steady rate of 100 A/s, the emf induced in coil Y is ____________

1. 0.3 V
2. 0.5 V
3. 1 V
4. 1.5 V

✅ Correct Answer: 1

A 50 Hz current has an amplitude of 25 A. The rate of change of current at t = 0.005 after i = 0 and is increasing is ____________

1. 2221.44 A/s
2. 0
3. -2221.44 A/s
4. -3141.6 A/s

✅ Correct Answer: 2

Consider a series RL circuit in which current 12 A is flowing through R and current 16 A is flowing through L. The current supplied by the sinusoidal current source I is ____________

1. 28 A
2. 4 A
3. 20 A
4. Cannot be determined

✅ Correct Answer: 3

Consider a circuit having resistances 16 Ω and 30 Ωis excited by a voltage V. A variable resistance R is connected across the 16 Ω resistance. The power dissipated in 30 Ω resistance will be maximum when value of R is __________

1. 30 Ω
2. 16 Ω
3. 9 Ω
4. 0

✅ Correct Answer: 3

Consider a cube having resistance R on each of its sides. For this non-planar graph, the number of independent loop equations are _______________

1. 8
2. 12
3. 7
4. 5

✅ Correct Answer: 4

A network contains linear resistors and ideal voltage source S. If all the resistors are made twice their initial value, then voltage across each resistor is __________

1. Halved
2. Doubled
3. Increases by 2 times
4. Remains same

✅ Correct Answer: 4

Consider a circuit having resistance 10 kΩ, excited by voltage 5 V and an ideal switch S. If the switch is repeatedly closed for 2 ms and opened for 2 ms, the average value of i(t) is ____________

1. 0.25 mA
2. 0.35 mA
3. 0.125 mA
4. 1 mA

✅ Correct Answer: 3

A particular electric current is made up of two components a 10 A, a sine wave of peak value 14.14 A. The average value of electric current is __________

1. 0
2. 24.14 A
3. 10 A
4. 14.14 A

✅ Correct Answer: 3