Networks Analysis and Synthesis Test 1 - Online Electronics and Communication Engineering Test

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Marks : 2/20

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In an R-C series circuit excited by a voltage E, the charge across capacitor at t = 0⁺ is

CE (1 - e^-t/RC)

none of the above

[#]

In an unloaded transformer, the fluxes limiting the primary and secondary are 30 mWb and 20 mWb. The coefficient of coupling is

0.1

0.33

0.67

[#]

In following circuit, steady state is reached with S open, S is closed at t = 0, the current I at t = 0⁺ is given by

9 Ω

6 Ω

7 Ω

10 Ω

[#]

When a function Z(s) having a pole at infinity is realized, we get

a capacitance in series

a resistance in series

an inductance in series

a resistance or inductance in series

[#]

In the circuit shown in figure the inductor current and capacitor voltage are given at a time t. At this instant i is __________ A and

is __________ A/sec.

-5 A, 10 V

5 A, 50 V

2.5, 25

0, ∞

[#]

For an RC admittance function Y, the slope dY/dσ

is positive

is negative

may be positive or negative

[#]

A network has only independent current sources and resistance. If values of all resistors are doubled, the values of node voltages

will become half

will remain unchanged

will become double

cannot be determined unless circuit configuration and values of resistors are known

[#]

Which of the following is/are correct? The circuit shown in the figure.

is reciprocal
has Z₁₁ = 2, Z₂₂ = 2
has Z₁₁ = 4, Z₂₂ = 2
has Z₁₁ = 0, Z₂₂ = 2

Select the correct answer using the code given below:

1 and 3

1 and 2

1 and 4

3 only

[#]

Force = Electric intensity x current.

True

False

[#]

10.

Which is correct for a transfer function?

The poles and zero must be complex

If the poles and zeros are complex or imaginary, they must be conjugate

If the poles and zeros are complex they must be simple

If a zero is imaginary, it must be simple

[#]

11.

Consider the following statements regarding driving point admittance function

It is an admittance of R₁ network
Poles and zeros alternate on the negative real axis of plane
The lowest critical frequency is a pole
Y(0) = 1/3

Which of these statements are correct?

1, 2 and 3

2 and 4

1 and 3

1, 2, 3 and 4

[#]

12.

Which one of the following functions is RC driving point impedance?

[#]

13.

The two port networks are connected in cascade, the combination is to be represented as a single two-Port network. The parameters of the network are obtained by multiplying the individual matrix

z-parameter

h-parameter

y-parameter

ABCD parameter

[#]

14.

At very low temperatures, semiconducting materials behave as insulators.

True

False

[#]

15.

A nickel cadmium cell is an alkaline cell.

True

False

[#]

16.

Current in a 2H inductance in 10e^-t A. Admittance of the inductor is

-0.5 mho

0.5 mho

5 mho

10 mho

[#]

17.

The flux linkage ψ, self inductance L and current i are related as

ψ = L/i

ψ = Li

ψ = Li²

[#]

18.

In liquids charge carriers are electrons only.

True

False

[#]

19.

For a transfer function H(s) = P(s)/Q(s), where P(s) and Q(s) are polynomials in s

the degrees of P(s) is always greater than degree of Q(s)

the degree of P(s) and Q(s) are equal

the degree of P(s) is independent of degree of Q(s)

the maximum difference in degrees of P(s) and Q(s) is 1

[#]

20.

A function f(t) = k e^at is __________ for (a > 0).

stable

unstable

marginal

none

[#]

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Online Electronics and Communication Engineering Test - Networks Analysis and Synthesis Test 1

Marks : 2/20

Test Review : View answers and explanation for this test.

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