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Q1. | The modulation index of a narrowband FM signal is |

A. | nearly equal to 0.3 [Correct Answer] |

B. | much less than unity [Wrong Answer] |

C. | nearly 0.5 [Wrong Answer] |

D. | much more than unity [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ A receiver has poor selectivity. It will also have poor

sensitivity

double spotting

blocking

diversity reception

⇒ The

*z*-transform of sequence

*x*[

*n*] = δ(

*n*) is

1

∞

0

*z*

⇒ A parametric amplifier uses

non linear resistance

non linear reactance

either (a) or (b)

neither (a) nor (b)

⇒ The main reason why Ni-Zn ferrites are used for audio and T.V. transformers is that

they have large saturation magnetization

they are easy to fabricate by rolling

they are totally free from pores and voids

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⇒ 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 a 3 phase semiconverter, the dc output voltage for a certain firing angle is 50% of the maximum possible value. The firing angle is

30°

60°

90°

120°

⇒ A network is said to be non-linear if it does not satisfy

homogeneity condition

superposition condition

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⇒ It two voltages are

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*t*- 30°) and

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*v*

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*v*

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*v*

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*v*

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*v*

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*v*

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⇒ Holes act like

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⇒ If all the LEDs in a seven segment display are turned on, the number displayed is

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⇒ End fire array has narrow bandwidth.

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⇒ Which of the following amplifier circuits has highest input impedance?

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Circuit using MOSFET

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⇒ When a material becomes a superconductor, its resistivity becomes

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⇒ If the atomic number of germanium is 32, the number of electrons in the outer most shell will be

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⇒ The realization of the term Ks yields

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⇒ The input resistance R, of an ideal voltage amplifier is __________ and that of a current amplifier is __________ .

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⇒ Load cell uses

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capacitor

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⇒ In a cable with ∈

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0.75 x 10

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⇒ In figure which is correct at any time

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I =

I =

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⇒ In microwave communication links the fading due to rain occurs. The methods to solve this problem include

antenna replacement and feed correction

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polarization shifting and code diversity

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⇒ The current flowing through a pure capacitor is called displacement current.

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⇒ An end fire array consisting of several half-wave lengths of directive gain 40, then Find width of major lobe for broadside

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⇒ Which control action can never be used alone?

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known inductance

known capacitance and resistance

known capacitance

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is

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FALSE

⇒ A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/

about 1350 rpm

about 720 rpm

about 360 rpm

either (b) or (c)

⇒ In microwave communication links the fading due to rain occurs. The methods to solve this problem include

antenna replacement and feed correction

amplitude trimming and phase correction

polarization shifting and code diversity

path diversity and frequency diversity

⇒ The current flowing through a pure capacitor is called displacement current.

TRUE

FALSE

⇒ An end fire array consisting of several half-wave lengths of directive gain 40, then Find width of major lobe for broadside

6°

5.73

51.25

0°

⇒ Which control action can never be used alone?

Proportional

Derivative

Integral

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⇒ In an Anderson bridge the unknown inductance is measured in terms of

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known inductance

known capacitance and resistance

known capacitance

⇒ In

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*p*typeis

*n*typeis metallic

may be

*p*or*n*type⇒ A band elimination constant

*k*filter has series resonant circuit in series arms.TRUE

FALSE

⇒ A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/

*f*is constant. At 50 Hz, the speed is 1440 rpm. At 25 Hz, the speed is likely to beabout 1350 rpm

about 720 rpm

about 360 rpm

either (b) or (c)