Questions and answers for exam Preparation

MCQs

Total Questions : 2104 | Page 5 of 211 pages

Question 41.

Which of the following statements is incorrect?

Ideal voltage source is one whose internal resistance is zero
Ideal voltage source is one whose internal conductance is zero
Ideal voltage source is one whose generated voltage is equal to the available terminal voltage
Ideal current source is one whose internal conductance is zero

Discuss Question

Answer: Option B. -> Ideal voltage source is one whose internal conductance is zero

Question 42.

Consider the following statements for a driving point function F(j`omega`):

Re F(j`omega`) is an even function of `omega` and is 0 or positive for all values of `omega`.
Im F(j`omega`) is an even function of `omega` and is 0 or positive for all values of `omega`.
Re F(j`omega`) is an odd function of `omega` and is 0 or negative for all values of `omega`.
Re F(s) = 0 for Re s = 0.

Which one of the statements given above is/are correct?

1 only
1 and 4
2, 2 and 4
4 only

Discuss Question

Answer: Option A. -> 1 only

Question 43.

Which of following is linear and bilateral parameter?

Resistors
Semi conductor diodes
Electron tubes
Transistor

Discuss Question

Answer: Option A. -> Resistors

Question 44.

A 2-terminal
network consists of one of the RLC elements. The elements is connected
to an ac supply. The current through the element is 1 A. When an
inductor is inserted in series between the source and the element, the
current through the element becomes 2 A. What is this element?

A resistor
An inductor
A capacitor
Cannot be single element

Discuss Question

Answer: Option C. -> A capacitor

Question 45.

Parallel wire transmission line is an example of

lumped network
distributed
depend upon I/P signal strength
power I/P

Discuss Question

Answer: Option B. -> distributed

Question 46.

Which one of the following is an active component?

Diode (p-n)
Transistor as Amplifier
Transformer
Inductor

Discuss Question

Answer: Option B. -> Transistor as Amplifier

Question 47.

A capacitor used for power factor correction in single- phase circuit decreases

the power factor
the line current
both the line current and the power factor
the line current and increases power factor

Discuss Question

Answer: Option D. -> the line current and increases power factor

Question 48.

A phasor is

a line representing the magnitude and direction of an alternating quantity
a line which represents the magnitude and phase of an alternating quantity
an instrument used for measuring phases of an unbalanced 3-phase load
a coloured tag or band for distinguishing between different phases of a 3-phase supply

Discuss Question

Answer: Option B. -> a line which represents the magnitude and phase of an alternating quantity

Question 49.

Permittivity has the units of F/m.