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Q1. | The difference between phase and frequency modulation |

A. | is purely of academic interest [Wrong Answer] |

B. | lies in the different definitions of the modulation index [Correct Answer] |

C. | lies in the poor audio response of phase modulation [Wrong Answer] |

D. | is too great to make the two systems compatible [Wrong Answer] |

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

⇒ Which stage generates RF carri

Amplifier

Oscillator

Power supply

All of the above

⇒ A dc machine has 6 poles all connected in series. Each pole has 9 H inductance and field current is 2 A. Total inductance and total energy stored are

9 H and 18 J

18 H and 36 J

54 H and 108 J

108 H and 216 J

⇒ The number of valence electrons in germanium atom is

4

2

1

zero

⇒ In a controlled rectifier a freewheeling diode is necessary if the load is

inductive

resistive

capacitive

any of the above

⇒ In thermal ohm's law, temperature and power loss are analogous to

V and I respectively of ohm's law

I and V respectively of ohm's law

R and V respectively of ohm's law

I and R respectively of ohm's law

⇒ A differential amplifier consists of two CB amplifiers.

TRUE

FALSE

⇒ The modulus of counter in the given figur

1

2

3

4

⇒ The owner of a communication satellite is usually required to keep the spacecraft on station at its assigned place in the geosynchronous orbit with an accuracy of __________ degree.

0.1

1

2

0.5

⇒ 110.11

_{2}x 110

_{2}= __________

_{10}

40.5

30.5

20.5

10.5

⇒ Pick the correct statement with respect to following fig

both the circuit are not identical filter Ckts

identical filter circuit at all frequencies

identical filter circuit at low frequency

identical filter circuit at high frequency

⇒ The equivalent circuit of an op-amp has

a virtual ground at input

a virtual ground at output

virtual ground at input as well as at output

none of the above

⇒ In a reverse biased P-N junction, the current through the junction increases abruptly at

zero voltage

1.2 V

0.72 V

breakdown voltage

⇒ In the given figure,

(A + B)C + DE

AB + C(D + E)

(A + B)C + D + E

none of the above

⇒ Read the following statements: Dual slope ADC provides

- higher speed as compared to other ADC
- very good accuracy
- good rejection of power supply
- better resolutions compared to other ADC for the same number of bits

1 and 2

2 and 3

1, 2, 3

1, 2, 3, 4

⇒ The generally used value of EHV supply in TV receivers is

1 kV per diagonal cm

1 kV per diagonal inch

0.5 kV per diagonal cm

0, 5 kV per diagonal inch

⇒ It is desired to design a phase shift oscillator using an FET having a

*g*= 5000 μSiemen,

_{m}*r*= 40

_{d}*k*Ω and feedback circuit value of R = 10 K. Then value of C for oscillator operation at 1

*k*H

*z*and that of

*R*for A = 40 to ensure oscillator action are

_{D}6.4

*n*F, 80 K

6.5

*n*F, 10 K

6.5

*p*F, 10 K

65

*p*F, 80 K

⇒ Which of the following is a valid logical expression in Pascal?

2.5 : = A

(A + B) < < (C + D)

A = < B

A > = B

⇒ A voltage of 9 V is applied in forward direction to a semiconductor diode in series with a load resistance of 1000 Ω. The voltage across the load resistance is zero. It indicates that

diode is short circuited

diode is open circuited

resistor is open circuited

diode is either o.c or s.c

⇒ For a paramagnetic material, susceptiblity increases with increasing temperature.

TRUE

FALSE

⇒ A coil has a designed for high Q performance at a rated voltage and a specified frequency. If the frequency of operation is doubled, and the coil is operated at the same rated voltage, then the Q factor and the active power P consumed by the coil will be affected as follows.

P is doubled, Q is halved

P is halved, Q is doubled

P remains constant, Q is doubled

P decreases 4 times, Q is doubled

⇒ In carbon resistor colour code, the third band is red. It indicates

two zeros

three zeros

multiplier is 0.01

multiplier is 0.1

⇒ In a second order system with a unit step input, the speed of response is high if system is

overdamped

undamped system

critically damped

underdamped

⇒ Find the output voltage for 011100 in a 6 bit R-2

*R*ladder D/A converter has a reference voltage of 6.5 V.

6.4 V

2.84 V

0.1 V

8 V

⇒ The ratio of diffusion constant for hole D

_{P}to the mobility for holes is proportional to

T

^{2}

T

1/T

T

^{3}

⇒ Integral error compensation changes a second order system to

first order system

third order system

fourth order system

either (a) or (b) depending on the system

⇒ For the transport lag G(

*j*ω) =

*e*

^{-jωT}, the magnitude is always equal to

0

1

10

0.5

⇒ The linear transistor circuits always operate in the

saturation

cut off

active

inactive

⇒ If

*x*

_{1}(

*t*) = 2 sin p

*t*+ cos 4 p

*t*and

*x*

_{2}(

*t*) = sin 5 p

*t*+ 3 sin 13 p

*t*then

*x*

_{1},

*x*

_{2}both periodic

*x*

_{1}

*x*

_{2}both not periodic

*x*

_{1}periodic,

*x*

_{2}not periodic

*x*

_{1}is not periodic ; but

*x*

_{2}is periodic

⇒ Pick the odd one

variance

standard deviation

expectation

chebyshev inequality

⇒ Each term in POS form is called max terms.

TRUE

FALSE