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Q1. | A satellite that simply reflect back the signals from one region of the earth to the other region is known as |

A. | orbiting satellite [Wrong Answer] |

B. | geostationary satellite [Wrong Answer] |

C. | active satellite [Wrong Answer] |

D. | passive satellite [Correct Answer] |

View Answer
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 :**

⇒

**Assertion (A):** The rms value of *v* = 1 + sin ω*t* is 1.5

**Reason (R):** If *i* = I_{0} + I_{1m} sin ω_{1}*t* + I_{3m} sin 3ω_{1}*t*,

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

⇒ In sound recording the degree of pre-emphasis is about 6 dB/ octave.

TRUE

FALSE

⇒ The integral of a unit impulse is unit step function.

TRUE

FALSE

⇒

**Assertion (A):** Free space does not interfere with normal radiation and propagation of radio waves

**Reason (R):** Free space has no magnetic or gravitational fields.

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 but R is wrong

A is wrong but R is correct

⇒ A full bridge inverter is fed by a battery of 30 V. The rms value of output voltage is

15 V

152 V

30 V

302 V

⇒ If W

_{F}is the Fermi level, then in a metal at T = 0

all energy levels above W

_{F}filled, all those below W

_{F}are empty

all energy levels below W

_{F}are filled, all those above W

_{F}are empty

some energy levels, both below and above W

_{F}, are filled

all energy levels below and above W

_{F}are filled

⇒ The function shown in figure, can represent a probability density function for A _______

A = 1/4

A = 1/6

A = 1/9

A = 1/2

⇒ In a loss line R

_{L}< Z

_{0}, then

Reflection coefficient is zero

Reflection coefficient is ∞

Reflection coefficient is negative

Reflection coefficient is positive

⇒ In colour TV system the colour sub carrier frequency is 4.43 MHz.

TRUE

FALSE

⇒ For a NAND SR latch of input is the normal resting state of inputs is

S = R = 1

S = 0, R = 1

S = 1, R = 0

S = R = 0

⇒ The measure of mismatch between the load and the transmission line is known as

directivity

Gain

standing wave ratio

reflection coefficient

⇒ An antisymmetric filter having odd number of coefficient may have a performance as

low pass

high pass

band pass

all pass

⇒ A message signal

*x*(

*t*) is amplitude modulated with carrier

*c*(

*t2ω*

3ω

1ω

0.5ω

3ω

1ω

0.5ω

⇒ The emitter resistor R

temperature only

β of transistor

both temperature and β

none of the above

⇒ The magnitude of transport lag factor is always zero.

TRUE

FALSE

⇒ In high frequency region, an amplifier behaves like a

band pass filter

low pass filter

high pass filter

any of the above

⇒ For a second order system with 0 < ξ < 1, the angle which poles make with negative real axis is

sin

cos

tan

cot

⇒ Which of the following statement is correct?

Pre-emphasis circuits are used in AM transmitters

FM reception is noise free as compared to AM

A limiter state is also used in AM receivers

Discriminator is used for the detection of AM signals

⇒ The inconsistency of Ampere's law can be removed by adding __________ to it.

displacement current density alone.

conduction current density alone.

displacement and conduction current densities.

none of these

⇒ How much r.m.s. current does a 300 W, 200 V bulb take from the 200V, 50 Hz power line?

0.5 A

1.5 A

0.0833333333333333

0.125

⇒ The natural frequency S

-1

1

42737

-2

⇒ In the stabilized reactance modulator AFC system

phase modulation is converted into amplitude modulation by the equalizer circuit

the discriminator frequency must not be too low or the system will fail

the discriminator must have a fast time constant to prevent demodulation

the higher discriminator frequency, better the oscillator frequency stability

⇒ In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half the secondary winding is 40 V. If diodes are ideal, the average output voltage is

40 V

25.5 V

20 V

2.55 V

⇒ What is the characteristic of a good control system?

Sensitive to parameter variation

Insensitive to input command

Neither sensitive to parameter variation nor sensitive to input commands

Insensitive to parameter variation but sensitive to input commands

⇒ A half wave diode rectifier has a capacitance input filter. If input voltage is V

V

2 V

3 V

4 V

⇒ There are four different algorithms A1, A2, A3 and A4 to solve, a given problem with the complexity order log(n), log(log(n)), n log and n/log(n) respectively. Which is the best algorithm?

A1

A2

A3

A4

⇒ The stationary process has

all the statistical Properties dependent on time.

all the statistical Properties independent of time.

aime average is equal to ensemble average.

zero variance.

⇒ In the transformer shown in the figure, the inductance measured across the terminal 1 and 2 was 4 H with open terminals 3 and 4. It was 3H when the terminals 3 and 4 were short circuited. The coefficient of coupling woul

1

0.707

0.5

indetermine due to insufficient data

⇒ A switch tail ring counter is made by using a single D FF. The resulting circuit is a

SR FF

JK FF

D FF

T FF

⇒ For H(

a necessary condition

a sufficient condition

a necessary and sufficient condition

is not a necessary condition

⇒ The emitter resistor R

_{E}in the emitter of CE amplifier stabilizes the dc operating point against variation intemperature only

β of transistor

both temperature and β

none of the above

⇒ The magnitude of transport lag factor is always zero.

TRUE

FALSE

⇒ In high frequency region, an amplifier behaves like a

band pass filter

low pass filter

high pass filter

any of the above

⇒ For a second order system with 0 < ξ < 1, the angle which poles make with negative real axis is

sin

^{-1}ξcos

^{-1}ξtan

^{-1}ξcot

^{-1}ξ⇒ Which of the following statement is correct?

Pre-emphasis circuits are used in AM transmitters

FM reception is noise free as compared to AM

A limiter state is also used in AM receivers

Discriminator is used for the detection of AM signals

⇒ The inconsistency of Ampere's law can be removed by adding __________ to it.

displacement current density alone.

conduction current density alone.

displacement and conduction current densities.

none of these

⇒ How much r.m.s. current does a 300 W, 200 V bulb take from the 200V, 50 Hz power line?

0.5 A

1.5 A

0.0833333333333333

0.125

⇒ The natural frequency S

_{n}of the given circui-1

1

42737

-2

⇒ In the stabilized reactance modulator AFC system

phase modulation is converted into amplitude modulation by the equalizer circuit

the discriminator frequency must not be too low or the system will fail

the discriminator must have a fast time constant to prevent demodulation

the higher discriminator frequency, better the oscillator frequency stability

⇒ In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half the secondary winding is 40 V. If diodes are ideal, the average output voltage is

40 V

25.5 V

20 V

2.55 V

⇒ What is the characteristic of a good control system?

Sensitive to parameter variation

Insensitive to input command

Neither sensitive to parameter variation nor sensitive to input commands

Insensitive to parameter variation but sensitive to input commands

⇒ A half wave diode rectifier has a capacitance input filter. If input voltage is V

_{m}sin ω*t*, PIV isV

_{m}2 V

_{m}3 V

_{m}4 V

_{m}⇒ There are four different algorithms A1, A2, A3 and A4 to solve, a given problem with the complexity order log(n), log(log(n)), n log and n/log(n) respectively. Which is the best algorithm?

A1

A2

A3

A4

⇒ The stationary process has

all the statistical Properties dependent on time.

all the statistical Properties independent of time.

aime average is equal to ensemble average.

zero variance.

⇒ In the transformer shown in the figure, the inductance measured across the terminal 1 and 2 was 4 H with open terminals 3 and 4. It was 3H when the terminals 3 and 4 were short circuited. The coefficient of coupling woul

1

0.707

0.5

indetermine due to insufficient data

⇒ A switch tail ring counter is made by using a single D FF. The resulting circuit is a

SR FF

JK FF

D FF

T FF

⇒ For H(

*s*) to be positive real, the condition Re[H(*j*ω)] ≥ 0 for 0 ≤ ω ≤ ∞ isa necessary condition

a sufficient condition

a necessary and sufficient condition

is not a necessary condition