Q1. | In MTI radar, clutter means |

A. | echos from moving targets [Wrong Answer] |

B. | echos from stationary targets [Correct Answer] |

C. | atmospheric noise [Wrong Answer] |

D. | thermal noise [Wrong Answer] |

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Explanation:-
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⇒

*TE*

_{01}mode of propagation of electromagnetic energy

is merely the TE

_{10}mode rotated 90°

is merely the TE

_{10}mode rotated 180°

is the same as TE

_{10}mode

either (b) or (c)

⇒ A fully controlled bridge converter can operate in quadrants

1

1 and 2

1 and 3

1 and 4

⇒ In control systems the output of sensor usually, is

analog electrical signal

digital electrical signal

mechanical signal

analog or digital electrical signal

⇒ If X = 1 in the logic equation [X + Z { Y + (Z + X Y)}] { X + Z (X + Y)} = 1, then

Y = Z

Y = Z

Z = 1

Z = 0

⇒ Quantizing error occurs in

TDM

FDM

PCM

PWD

⇒ To draw ac equivalent circuit for a CE amplifier we should

Reduce all dc sources to zero

Short all capacitors

Reduce all dc sources to zero and short all capacitors

Reduce all dc sources to zero and open all capacitors

⇒ In a circuit the value of resistor is made four times. The noise voltage generated by this resistance will

be doubled

be increased four times

remain the same

become half

⇒ An electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis is

synchro control transformer

LVDT

stepper motor

tacho generator

⇒ A computer program is used to read M and print the sum 2 + 4 + 6 + 8 +.........+ 2M. If M = 9 , the print out will show the number

9

18

90

100

⇒ The baud rate is

not equal to signalling rate

always equal to bit transfer rate

equal to twice the bandwidth of an ideal channel

equal to half the bandwidth of ideal channel

⇒ If

*i*

_{b}is plate current,

*e*

_{b}is plate voltage and

*e*

_{c}is grid voltage the

*v*-

*i*curve of a vacuum triode

0.5 and 1

- 2 and 1

30 and 1

30 and 1.5

⇒ A retriggerable one shot is one which

can be triggered only once

has two quasi stable states

can not be retriggered till the complete pulse appears at output

can be retriggered while the output is being generated

⇒

**Assertion (A):** Oxide coated cathodes are very commonly used.

**Reason (R):** Work function of oxide coated cathode is 1 eV whereas it is 4.5 eV for pure tungsten.

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

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

A is true but R is false

A is false but R is true

⇒

**Assertion (A):** In Figure, the intercept of the line on *y*-axis is equal to *N* (a_{e} + a_{i}), where *N* is number of atoms/m^{3}, a_{e} is electronic polarizability and a_{i} is ionic polarizability.

**Reason (R):** a_{e} and a_{i} are independent of temperatu

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

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

A is true but R is false

A is false but R is true

⇒ The maximum forward current in case of signal diode is in the range of

1 A to 10 A

0.1 A to 1 A

few milli amperes

few nano amperes

⇒ A 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). Then, what will be input, if the output register shows 100111 at the end of conversion.

5.85 V

6 V

5 V

10 V

⇒ The number of channels in a stereophonic system is

8

4

2

1

⇒ To measure moisture in wood, the most suitable method is

electric conduction

electrical-capacitive

absorption of radiation

equilibrium-moisture Vs humidity

⇒ The Boolean expression A ⊕ B is equivalent to

AB + AB

AB + AB

B

A

⇒ A source generates three symbols with probabilities 0.25, 0.25, 0.50 at a rate of 3000 symbols per second. Assuming independent generation of symbols, the most efficient source encoder would have average bit rate is as

6000 bits/sec

4500 bits/sec

3000 bits/sec

1500 bits/sec

⇒ Consider the following statements about a magic tee

- The collinear arms are isolated from each other.
- On of the collinear arms is isolated from E arm.
- On of the collinear arms is isolated from H arm.
- E and H arms are isolated from each other.

1 and 2 are correct

1 and 3 are correct

1 and 4 are correct

2 and 3 are correct

⇒ Which of the following pairs are correctly matched?

- Brune's realisation : realisation with ideal transformer.
- Cauer realisation : ladder realisation.
- Bott Duffin realisation : with non ideal transformer.

1, 2 and 3

2 and 3

1 and 3

1 and 2

⇒ An op-amp integrating circuit uses

an inductor

a capacitor

both inductor and capacitor

none of the above

⇒ Figure shows an RC potentiometer to measure ac voltage. It is desired that V

_{0}/V

_{i}should be independent of frequency. The value of C should

10 μF

11 μF

0.1 μF

0.09 μF

⇒ Bipolar IC memories are fabricated using

high density versions of MOSFET or low density versions of bipolar transistor flip-flop.

high density version of MOSFET or bipolar transistor flip-flop

low density versions of MOSFETs

high density versions of the bipolar transistor flip-flop.

⇒ In the given figure the number of combinations of three non touching loop

0

1

2

3

⇒ The antenna current of an AM transmitter is 8 A. When only the carrier is sent, but it increases to 8.93 A. When the carrier is sinusoidally modulated. The percentage modulation is nearly

0.9

0.8

0.75

0.7

⇒ The circuit shown below is the equivalent circuit of which one of the following microwave resonator ty

Butterfly resonator

Parallel-wire resonator

Cavity resonator

Coaxial line resonator

⇒ The logic operations of the two circuits given below

complementary

identical

entirely different

none of these

⇒ The direction of pick up in a CD is

linear from centre towards edge

linear from edge to centre

nonlinear from centre to edge

nonlinear from edge to center