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Q1. | In a radar system the solution to blind speed problem is to |

A. | use MTI [Wrong Answer] |

B. | use monopoles [Wrong Answer] |

C. | vary PRF [Correct Answer] |

D. | change Doppler frequency [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 :**

⇒ The first and the last critical frequencies (singularities) of a driving point impedance function of a passive network having two kind of elements, are a pole and a zero respectively. The above property will be satisfied by

RL network only

RC network only

LC network only

RC as well as RL network

⇒ A three state switch has three outputs. These are

low, low and high

low, high, high

low. floating, low

low, high, floating

⇒ When a series RL circuit having power factor angle 0 is switched on to an ac voltage V

_{m}sin (ω

*t*+ Φ), the transient term is zero if Φ = 0.

TRUE

FALSE

⇒ Which of the following be true for a CE transistor amplifier if the emitter resistor value is made equal to zero?

- Its gain will increase
- Its stability will increase
- Its gain will decrease
- Its stability will decrease

1 and 2

2 and 3

3 and 4

1 and 4

⇒ The impulse response

*h*(

*t*) of a linear invariant continuous time system is given by h(

*t*) = exp (- 2

*t*)

*u*(

*t*), where

*u*(

*t*) denotes the unit step function. The output of this system to the sinusoidal input

*x*(

*t*) = 2cos(2

*t*) for all time

*t*, is

0

2

^{-0.25}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.25p)

⇒ In a sine wave, maximum rate of change of voltage occurs at

ascent of the waveform

+ ve maximum

- ve maximum

between maximum and minimum

⇒ In which frequency range is the noise figure in a transistor minimum

intermediate frequencies

low frequencies

high frequencies

very high frequencies

⇒ In a communication system, noise is most likely to affect the signal

at the transmitter

in the channel

in the information source

at the destination

⇒ A VF display operates on the principle of a vacuum diode.

TRUE

FALSE

⇒ In oscillators class C operation is preferred because

is most efficient

has frequency stability

gives larger output

it produces nearly square waves

⇒ In figure, the switch S is initially open and steady state conditions are reached. At

*t*= 0 switch is closed. The initial current through 2C capacito

zero

0.0416666666666667

0.0833333333333333

0.125

⇒ A system is highly oscillatory if

gain margin is high

gain margin is close to 1

gain margin is close to 1 or phase margin is zero

gain margin is high and phase margin is 180°

⇒ Tuned voltage amplifiers are not used

radio receivers

public address system

T.V. Receivers

band of freq. selected and amplified

⇒ Read the following statements about Java

- It is well suited to design software which works in conjunction with internet.
- It is cross platform language.
- Java is close to programming language C, C ++ etc.
- It is an object oriented.

All

1, 2 and 3 only

1, 2 and 4 only

2, 3, 4 only

⇒ Modulation index of a AM wave is measured using oscilloscope. The display on the CRO is as shown in figure it can be concluded t

the output wave is distorted

the output wave is under modulated

the modulation index is 100%

the modulation index is 50%

⇒ If quadratic equation

*x*

^{2}- 1000

*x*+ 25 = 0 is solved using floating point arithmetic with 4 digit mantissa, the roots are

.1000 E 4 and .1000 E 4 respectively

.0000 E 4 and .0000 E 4 respectively

.1000 E 4 and .0000 E 4 respectively

None of the above

⇒ Which of the following is invalid in Basic?

A ** B + - C

A ** B - C

A * B - C

A * B - C ** D

⇒ X and Y are two random variables and Z = X + Y . Letmz, m

*, m*

_{z}*, m*

_{x}*represent mean of Z, X and Y. Then*

_{y}*m*=

_{z}*m*+

_{x}*m*

_{y}*m*≤

_{z}*m*+

_{x}*m*

_{y}*m*<

_{z}*m*+

_{x}*m*

_{y}*m*>

_{z}*m*+

_{x}*m*

_{y}⇒ A thermocouple instrument can be used over a very wide frequency range.

TRUE

FALSE

⇒ A rectangular pulse train

*s*(

*t*) is shown in figure is convolved with the signal cos

^{2}(4p x 10

^{3}

*t*). The convolved signal will

DC

12 kHZ sinusoidal

8 kHZ sinusoidal

14 kHZ sinusoidal

⇒ In a 100% amplitude modulated signal, the power in the upper sideband when carrier power is to be 100 W and modulation system SSBSC, is

100 W

66 W

50 W

25 W

⇒ Dielectric strength of which of the following material has the highest dielectric strength?

Porcelain

Soft rubber

Glass

Joule effect

⇒ Which of the following is a valid FORTRAN assignment statement?

10 = N

X + 2.1 = 5.6

A = B

A = B = 1

⇒ An 8085 microprocessor is operating at 2 MHz frequency and executes the following progr

12

13

14

15

⇒ In terms of

*z*parameters, the condition for the network to be passive is

*z*

_{11}=

*z*

_{22}

*z*

_{12}=

*z*

_{21}

*z*

_{11}= 0

*z*

_{22}= 0

⇒ The amplifier used in bootstrap voltage sweep should have a gain of

1

+∞

-1

-∞

⇒ It is desired to reduce distortion in a CE amplifier circuit. We should

reduce emitter current

reduce collector current

reduce ac base voltage

reduce base emitter voltage

⇒ Which of the following is true?

The poisson distribution is limiting case of binomial distribution.

In symmetrical distribution, the mean, median and mode coincide.

Regression is the estimation or production of unknown values of one variables from known values of another variable.

All are true.

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

sin

^{-1}ξ

cos

^{-1}ξ

tan

^{-1}ξ

cot

^{-1}ξ

⇒ A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance

decreases

increases

remains constant

may increases or decreases