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Q1. | The distance of a synchronous satellite from Earth's surface is __________ km. |

A. | 300 [Wrong Answer] |

B. | 10000 [Wrong Answer] |

C. | 35900 [Correct Answer] |

D. | 5 [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 :**

⇒ It is desired to clean up ragged looking pulsed that have been distorted during transmission from one place to another, which of the following device will be appropriate?

Multiplexer

D/A converter

JK flip-flop

Schmitt trigger

⇒ An electrical network with 8 independent nodes will have __________ nodal equations.

4

6

7

8

⇒ The minimum number of comparators required to build an 8 bit flash ADC is

8

63

255

256

⇒

**Assertion (A):** Thyristors can be used in controlled heating, excitation systems of alternators, speed control of motors and HVDC

**Reason (R):** A static var system using thyristors is very commonly used in high voltage ac systems.

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

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

A is correct but R is wrong

A is wrong but R is correct

⇒ Consider the following as regards cumulative disribution function F(

*x*)

- 0 ≤ F(
*x*) ≤ 1 - F(- ∞) = 0
- F(∞) = 1
- F(
*x*_{1}) ≤ F(*x*_{2}) If*x*_{1}<*x*_{2}

1 and 2 only

1, 2 and 3 only

1, 2, 3 and 4

2 and 4

⇒ A JFET

is current controlled device

has low input resistance

has high gate current

is a voltage controlled device

⇒

**Assertion (A):** TTL is a very popular logic in SSI and MSI category.

**Reason (R):** In Schottky TTL the power dissipation is less than in ordinary TTL.

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

⇒ Which of the following is not an omnidirectional antenna?

Log periodic

Half-wave dipole

Discone

Marconi

⇒ For a level input sequential circuit

output in a level only

output is in the pulse form

output may be a pulse or a level form

none of these

⇒ IF amplifiers for radio receivers are often tuned to

456 Hz

456 kHz

3456 MHz

456 GHz

⇒ Which of the following noise does not occur in transistors?

Partition noise

Shot noise

Flicker noise

Resistance noise

⇒ In the circuit shown in the given figure the diode states at the extremely large negative values of the input voltage

*v*

*a*

_{i}D

_{1}off, D

_{2}off

D

_{1}on, D

_{2}off

D

_{1}off, D

_{2}on

D

_{1}on, D

_{1}on, D

_{2}on

⇒ A circuit is replaced by its Thevenin's equivalent to find current through a certain branch. If V

_{TH}= 10 V and R

_{TH}= 20 Ω, the current through the branch

will always be 0.5 A

will always be less than 0.5 A

will always be equal to or less than 0.5 A

may be 0.5 A or more or less

⇒ For the discrete time system of the given fig

*y*- 0.5

_{k}*y*

_{k}_{ - 1}- 0.25

*y*

_{k}_{ - 2}=

*u*

_{k}*y*+ 0.5

_{k}*y*

_{k}_{ - 1}- 0.25

*y*

_{k}_{ - 2}=

*u*

_{k}*y*- 0.5

_{k}*y*

_{k}_{ - 1}+ 0.25

*y*

_{k}_{ - 2}=

*u*

_{k}*y*+ 0.5

_{k}*y*

_{k}_{ - 1}+ 0.25

*y*

_{k}_{ - 2}=

*u*

_{k}⇒ A low ratio of the A.C. load impedance of a diode detector results in

diagonal clipping

poor AGC operation

poor AF response

negative peak clipping

⇒ Maximum rectification efficiency for a half wave rectifier is

1

0.88

0.5

0.406

⇒ Which of the following term applies to troposcatter propagation?

SIDs

Faraday rotation

Atmospheric storms

Fading

⇒ All digital circuits can be realised using only

EX-OR gates

Multiplexers

Half adders

OR gates

⇒ As per Matthiessen's rule, the total resistivity r of a conductor can be written as r = r

_{i}+

*a*T, where r

_{i}and

*a*are constants and T is absolute temperature. At very low temperatures

*a*T = 0

*a*T > r

_{i}

*a*T ∼ r

_{i}

*a*T < r

_{i}

⇒ In a combination limiter with sinusoidal input voltage the output wave can be nearly square.

TRUE

FALSE

⇒ In an

*n*channel JFET

I

_{D}, I

_{S}and I

_{G}are considered positive when flowing into the transistor

I

_{D}and I

_{S}are considered positive when flowing into transistor and I

_{G}is considered positive when flowing out of it

I

_{D}, I

_{S}, I

_{G}are considered positive when flowing out of transistor

I

_{S}and I

_{G}are considered positive when flowing into transistor and I

_{D}is considered positive when flowing out of it

⇒ For the amplifier in figure, β = 800. The mid-band voltage gain V

_{0}/V

_{i0< 1≈ 1800}

⇒ Narrow band FM signal can be represented as

A cos (2p

*f*) - β

_{c}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) - β

_{m}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) + β

_{c}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) + β

_{m}t*A*sin (2p

*f*) sin (2p

_{m}t*f*)

_{c}t⇒ A sinusoidal carrier voltage, having frequency 1000 Hz is amplitude modulated by a sinusoidal voltage of frequency 15 kHz. The frequency of upper and lower sidebands will be

1015 kHz and 985 kHz

1030 kHz and 970 kHz

13 kHz and 17 kHz

14 kHz and 16 kHz

⇒ In figure V

_{CEQ}for each transisto

V

_{CC}

0.5 V

_{CC}

0.75 V

_{CC}

0.25 V

_{CC}

⇒ Zero mean Gaussian noise of variance N is applied to a half wave rectifier. The mean squared value of the rectified output will be

0

N/2

N/2

N

⇒ A 300 V voltmeter has an accuracy of ± 2% of full scale deflection. When the reading is 222 V, the actual voltage

lies between 217.56 and 226.44 V

lies between 217.4 and 226.6 V

lies between 216 and 228 V

is exact 222 V

⇒ The sensitivity of a voltmeter using 0-5 mA meter movement is

50 Ω/V

100 Ω/V

200 Ω/V

500 Ω/V

⇒ In a series RLC circuit excited by

*e*= E

_{m}sin ω

*t*is seen that LC < 1/ω

^{2}. Then

I lags E

I leads E

I leads E are in phase

voltage across L and C are equal

⇒ An electron shell corresponding to principal quantum number

*n*can contain a maximum of

*n*

^{2}electrons

2

*n*

^{2}electrons

2

*n*electron

*n*

^{3}electron