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Q1. | Electronic tubes used for transmitter differ from their counterparts in the receivers in respect that |

A. | they are large in size [Wrong Answer] |

B. | they are capable of handling large powers [Wrong Answer] |

C. | they generate large amount of heat when in operation [Wrong Answer] |

D. | none of the above [Correct Answer] |

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Explanation:-
Answer : DDiscuss 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 :**

⇒ When the carrier is unmodulated, a certain transmitter radiates 9 kW when the carrier is sinusoidally modulated the transmitter radiates 10.125 kW. The modulation index will be

0.1

10.15

0.4

0.5

⇒ If INT = 50 and LOOT = 30, the result of assignment statement

`SAL = INT + LOOT`

is50

80

8

5

⇒

**Assertion (A):** The Laplace transform of a ramp is 1/*s*^{2}.

**Reason (R):** The integral of a unit step function gives an impulse function.

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

⇒ In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately be increased __________ times.

8

16

3

32

⇒ A bistable multivibrator

has no stable state

has one stable state

has two stable state

none of the above

⇒ Electromagnetic waves transport

energy only

momentum only

energy as well as momentum

neither energy nor momentum

⇒ Unlimited number of ICs 7490, 78492 and 7493 are available. Which of these could be used to build the dividse-by-60 circuit of fi

7490

7492

combination of 7490 and 7492

combination of 7492 and 7493

⇒ For the K map of the given figure the simplified Boolean expressio

A + BC

A + BC

A + B C

A + B C

⇒ The area of an impulse is

1

0

∞

any finite value

⇒ A system is stable if ROC

include the unit circle

exclude the unit circle

lies on Circle

entire plane

⇒ The p mode of operation of magnetron signifies that

the phase difference between adjacent anode poles is p radians

the phase difference between adjacent anode poles is a multiple of p radians

the total phase shift around the periphery is p radians

none of the above

⇒ Damping ratio =

actual resistance/critical resistance

critical resistance/actual resistance

critical resistance

none of the above

⇒ Transformer oil is

refined vegetable oil

refined mineral oil

mixture of vegetable and mineral oil

none of the above

⇒ Consider the following statements as regards SAW filter

- The centre frequency is determined by the pitch of IDT comb shaped electrodes
- The response can be modified shaping the overlap of comb electrodes
- The response is maximum when acoustic wave has its wavelength equal to pitch
- When a number of identical electrodes are arranged at the same pitch, the frequency characteristics of the filter is expressed by (sin
*x*)/*x*

1, 2, 3, 4

1, 2, 3 only

1, 2, 4 only

2, 3, 4 only

⇒ Consider the following statements regarding registers and latches:

- Registers are made of edge-triggered FFs, whereas latches are made from level-triggered FFs.
- Registers are temporary storage devices whereas latches are not.
- A latch employs cross-coupled feedback connections.
- A register stores a binary word whereas a latch does not.

1 only

1 and 3

2 and 3

3 and 4

⇒

**Assertion (A):** In C it is possible for functions to call themselves.

**Reason (R):** C makes use of 'Pointers'.

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

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

⇒ If operator '

*a*' = 1 ∠120° then (1 -

*a*) =

3

3 ∠ - 30°

3 ∠ + 30°

3 ∠60°

⇒ The multiplication of two

*n*bit numbers gives a product of length less than or equal to

*n*bits

2

^{n}bits

2

*n*bits

2

^{n}- 1 bits

⇒

**Assertion (A):** 2's complement arithmetic is preferred in digital computers

**Reason (R):** The hardware required to obtain 2's complement is simple.

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

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ A meter having 0-1000 μA range and 1000 Ω resistance is required to be changed to 0-100 mA meter. The value of shunt resistance is about

1 Ω

10 Ω

99 Ω

100 Ω

⇒ In a rectifier only a portion of input power is converted into DC power. The rest is AC power.

TRUE

FALSE

⇒ A binary with a digits, all of which are unity has the value

*n*

^{2}- 1

2

^{n}2(

^{n - 1})

2

^{n}- 1

⇒ Highest resistivity of the following is

nichrome

constantan

metal

manganin

⇒ In a minimum function

the degree of numerator and denominator are equal

the degree of numerator and denominator are unequal

the degree of numerator is one more than degree of denominator

the degree of numerator is one less than degree of denominator

⇒ Energy = voltage x charge.

TRUE

FALSE

⇒ The ripple factor for a bridge rectifier is

0.406

1.21

1.11

2.22

⇒ In PM, without any modulation, all the transmitted pulses have the same

amplitude

width

amplitude and spacing

amplitude, spacing and width

⇒ A 3 phase dual converter consists of

two 3 phase semiconverters connected in parallel

two 3 phase semiconverters connected in antiparallel

two 3 phase full converters connected in antiparallel

two 3 phase full converters connected in parallel

⇒ The voltage in a circuit follows the law

*v*= 100 sin ω

*t*if the frequency is 25 Hz, how long will it take for the voltage to rise to 50 volts?

1/150

*s*

1/100

*s*

1/300

*s*

1/600

*s*

⇒ A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely resistive. The rms value of transformer secondary current is I

_{s}and rms value of load current in I

_{rms}. Then

I

_{s}= I

_{rms}irrespective of the value of firing angle

I

_{s}= 0.5 I

_{rms}irrespective of the value of firing angle

I

_{s}= I

_{rms}if firing angle is less than 30°

I

_{s}= I

_{rms}if firing angle is more than 30°