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Q1. | The highest modulation frequencies typically used in FM broadcast is |

A. | 5 kHz [Wrong Answer] |

B. | 10 kHz [Wrong Answer] |

C. | 15 kHz [Correct Answer] |

D. | 25 kHz [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ In a discharging R-L circuit voltage across the resistor exhibits

a linear rise

a linear decay

an exponential growth function

an exponential decay function

⇒ In the circuit shown in the given figure, switch

*k*is closed at

*t*= 0. The circuit was initially relaxed then which one of the following sources of

*v*(

*t*) will produce maximum current at

*t*= 0

^{+Unit stepUnit impulseUnit rampUnit step plus unit ramp}

⇒ If all other parameters are the same, a capacitor with mica as dielectric has higher capacitance than air capacitor.

TRUE

FALSE

⇒ RS latch can be built with

NOR gates

NAND gates

NOR or NAND gates

none of the above

⇒ The radar cross-section of a target depends an

frequency

polarization of incident wave

aspect of target

all of the above

⇒

**Assertion (A):** Power is the rate at which energy is supplied.

**Reason (R):** Energy = VI*t*.

Both A and R are true and R is correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

⇒ What is typical bandwidths of a 2-wire telephone line?

300 Hz to 3.4 kHz

20 Hz to 4 kHz

dc to 4 kHz

20 Hz to 20 kHz

⇒ Discrete transistors T

_{1}and T

_{2}having maximum collector current rating of 0.75 amp are connected in parallel as shown in the figure, this combination is treated as a single transistor to carry a total current of 1 ampere, when biased with self bias circuit. When the circuit is switched on, T

_{1}draws 0.55 amps and T

_{2}draws 0.45 amps. If the supply is kept on continuously, ultimately it is very likely

Both T

_{1}, and T

_{2}get damaged

Both T

_{1}, and T

_{2}will be safe.

T

_{1}Will get damaged and T

_{2}will be safe

T

_{2}will get damaged and T

_{1}, will be safe.

⇒ For a directional coupler the power is in the ratio of

40 dB

30 dB

20 dB

10 dB

⇒ A particular green LED emits light of wavelength 5490, Å, the energy bandgap of the semiconductor material used there is ..

*h*= 6.6 x 10

^{-34}J sec.

2.26 eV

1.98 eV

1.17 eV

0.74 eV

⇒ In a klystron amplifier the transit time of electron passing the gap in the cavity should be

less than one cycle

less than half cycle

less than quarter cycle

more than quarter cycle

⇒ Choose the correct option

- Transit period is the time between two steady state
- Transient Response is the response due to internal energy stored in circuit
- Transit response is also called natural response
- Transit response arises due to presence of C and L in the circuit
- Transit is due to R, L, C in the circuit

4, 3, 2 , 1

5, 4, 3, 2

5, 4, 3, 1

5, 1, 4

⇒ The depletion layer across a P

^{+}

*n*junction lies

mostly in the P

^{+}region

mostly in

*n*region

equally in both the P

^{+}and

*n*-region

entirely in the P

^{+}region

⇒ It is desired to reduce distortion in an amplifier from 8% to 2% by using 5% negative feedback. The open and closed loop gains respectively are

60 and 15

15 and 60

6 and 1.5

1.5 and 6

⇒ A 400 W carrier is modulated to a depth of 75 percent. The total power in modulated wave will be

38.5 W

400 W

512.5 W

615.5 W

⇒ While calibrating an ammeter by a dc potentiometer it is necessary to use a standard resistance.

TRUE

FALSE

⇒ It is desired to evaluate the expression

`F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

`F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]`

`F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

` X = COS(Y)`

⇒ Which of the following DO statements is invalid in FORTRAN 77?

DO 161 = 1, 15

DO 16 1 = 1, 10, 1

DO 16 I = - 5, 5, 2

none of the above

⇒ The gain of an half wavelength antenna is

2.15 dB

10 dB

1.78 dB

100 dB

⇒ Some features of advanced mobile phone service are - To provide telephone communication to a large number of telephone users within the area of a metropolitan only
- To use minimum amount of frequency spectrum
- To permit hand held as well as vehicle operation of telephone

Which of the above are true?

1 and 2 only

1, 2, 3

1 and 3 only

2 and 3 only

⇒ A MOSFET has a threshold voltage of 1 V and oxide thickness of 500 x 10^{-8} [ε_{r} = 3.9; ε_{0} = 8.85 x 10^{-14} F/cm, *q* = 1.6 x 10^{-19} *c*]. The region under the gate is ion implanted for threshold voltage tailoring. The base and type of impant required to shift threshold voltage to - 1 V are __________ .

8.6 x 10^{11}/*cm*^{2}, *p*-type

8.6 x 10^{11}/*cm*^{2}, *n*-type

0.86 x 10^{9}/*cm*^{2}, *p*-type

1.02 x 10^{12}/*cm*^{2}, *n*-type

⇒ DeMorgan's second theorem is

A . A = 0

A = A

A + B = A . B

AB = A + B

⇒ Which binary addition is incorrect?

1101.1 + 1011.1 = 11001.0

101101 + 1101101 + 1100011

0.0011 + 0.1110 + 1.0001

1100.001 + 1011.011 = 10111.100

⇒ The damping coefficient for the given circuit is _______

42737

42739

2

1

⇒ A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 100. If each of R, L and C is doubled from its original value, the new Q of the circuit is

25

50

100

200

⇒ Which of the following real variable names is not valid in Fortran?

BETA

ALPHA

A

AB * 2

⇒ NAND gates can be used to produce edge triggering.

TRUE

FALSE

⇒ The Fourier series of a real periodic function has only - Cosine terms if it is even
- Sine terms if it is even
- Cosine terms if it is odd
- Sine terms if it is odd

Which of the above statements are correct?

(1) and (4)

(1) and (2)

(2) and (4)

(2) and (3)

⇒ A rectangular waveguide of internal dimensions (*a* = 4 cm and *b* = 3) is to be operated in TE_{11} mode. The minimum operating frequency is

6.25 GHz

6.0 GHz

5.0 GHz

3.75 GHz

⇒ Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.

28000

15000

36000

11100

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