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Q1. | The coefficients F_{n} in the exponential form of Fourier series are |

A. | independent of frequency [Wrong Answer] |

B. | functions of frequency [Correct Answer] |

C. | even function of frequency [Wrong Answer] |

D. | odd functions of frequency [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ The impulse response

*h*(

*t*) of a linear time-invariant continuous time system is described by

*h*(

*t*) = exp (a

*t*)

*u*(

*t*) + exp (β

*t*)

*u*(-

*t*), where

*u*(

*t*) denotes the unit step function, and a and β are constants. This system is stable if

a is positive and β is positive

a is negative and β is negative

a is positive and β is negative

a is negative and β is positive

⇒ Class C amplifier is suitable for

a narrow frequency band

a wide frequency band

audio frequencies

either (b) or (c)

⇒ The maximum temperature limit of class B insulation is

90°C

105°C

120°C

130°C

⇒ In a push pull circuit the two transistors are

both

*pnp*

both

*npn*

one

*pnp*and other

*npn*

either (a) or (b)

⇒ A half adder adds

2 bits

3 bits

4 bits

2 or 3 bits

⇒ Two sinusoidal signals of equal amplitude and frequency are applied to X and Y plate of CRO respectively. The observed Lissajous pattern is a straight line. The phase shift between signals is

zero

90°

either zero or 180°

either 90° or 270°

⇒ At a temperature of 7 K, lead is a superconductor.

TRUE

FALSE

⇒ In a single sideband suppressed carrier AM system, the modulation index is changed from 0 to 1, the power content of the signal

will be quarter

will be doubled

will increase by 50 percent

will increase by 25 percent

⇒ A parity check usually can detect

one-bit error

double-bit error

three-bit error

any-bit error

⇒

- P(
*s*) =*s*^{4}+*s*^{3}+ 2*s*^{2}+ 4*s*+ 3 - Q(
*s*) =*s*^{4}+ 2*s*^{3}+*s*

*s*) and Q(

*s*) polynomials?

Both P(

*s*) and Q(

*s*) are Hurwitz

Both P(

*s*) and Q(

*s*) are non-Hurwitz

P(

*s*) is Hurwitz but Q(

*s*) is non-Hurwitz

P(

*s*) is non-Hurwitz but Q(

*s*) is Hurwitz

⇒ Which of the following is/are correct? The circuit shown in the fig

1 and 3

1 and 2

1 and 4

3 only

⇒ Thevenin's equivalent circuit

can be drawn only in time domain

can be drawn only in frequency domain

can be drawn both in time and frequency domain

can be drawn in frequency domain with some restrictions

⇒ Which of the following flip-flop is used as a latch?

J K flip-flop

R S flip-flop

T flip-flop

D flip-flop

⇒ Which of the following is not considered as a useful quantity in comparing noise performance of receivers?

Noise temperature

Noise figure

Noise resistance

Input noise voltage

⇒ A cycloconverter for single phase operation has

one positive group and one negative group converters

two positive group and two negative group converters

three positive group and three negative group converters

any of the above

⇒ Which of the following equations satisfy Maxwell's equations?

E

_{x}= E

_{y}= 0, E

_{z}= cos (

*y*-

*ct*)

E

_{x}= E

_{y}= 0, E

_{z}= cos (

*y*-

*ct*)

F

_{y}= cos (

*y*-

*ct*), E

_{x}= E

_{z}= 0

None of these

⇒ A resistor is rated at 0.75 watt, 1 kΩ. Its current rating is

1 mA

27.386 mA

1.268 mA

5.393 mA

⇒ The given figure shows three Nyquist plots of G(

*s*) H(

*s*) =

*e*/[

^{-sT}*s*(

*s*+ 1)] for different values of T. The curves 1, 2, 3 ca

for T = 0, 0.5 and 1 respectively

for T = 1, 0.5 and 0 respectively

for T = 0.5, 1 and 0 respectively

for T = 0, 1 and 0.5 respectively

⇒ Square law modulators utilise

linear range of V-I characteristics of a diode

linear range of V-I characteristics of a triode

non-linear region of V-I dynamic characteristics of a diode

non-linear region of V-I dynamic characteristics of a triode

⇒ Surge current rating of an SCR is

the maximum repetitive surge current in which the SCR can withstand

the maximum non-repetitive surge current in which the SCR can withstand

the maximum repetitive or non repetitive surge current in which the SCR can withstand

the maximum surge current in which the SCR can withstand if both surge current and steady current exist together

⇒ The Ni-Zn ferrites are used for audio and TV transformers is that

they have large saturation magnetisation

they are easy to fabricate by rolling

they are free from pores and voids

they have high electro-resistivity

⇒ The first machine cycle of an instruction is always

a memory read cycle

a fetch cycle

a input/output read cycle

a memory write cycle

⇒ Permalloy is

a variety of stainless steel

a polymer

a conon-ferrous alloy used in aircraft industry

a nickel an iron alloy having high permeability

⇒ Sound waves are electromagnetic waves.

TRUE

FALSE

⇒ Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after XRA A?

A 6 H, 1

A 6 H, 0

00 H, 0

00 H, 1

⇒ Rank of the matr

3

2

1

4

⇒ Skin effect is more pronounced at high frequencies.

TRUE

FALSE

⇒ Oscillations are obtained from a reflex klystron only for combinations of anode voltage and repeller voltage that give a favourable transit time.

TRUE

FALSE

⇒ The permanent magnet field system of brushless dc servo- motor is generally on

stator

rotor

partly on stator and partly on rotor

either (a) or (b)

⇒ The circuit in figure is

resonant commutation

line commutation

auxiliary commutation

complementary commutation