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Q1. | Reflex klystron oscillator is essentially a low power device |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ FET can used in

buffer amplifier circuits

cascade amplifier circuits

digital circuits

all of the above

⇒ A sample of N-type semiconductor has electron density of 6.25 x 10

^{18}/cm

^{3}at 300k. If the intrinsic concentration of carriers in this sample is 2.5 x 10

^{13}/cm

^{3}at this temperature the hole density works out to be

10

^{6}/cm

^{3}

10

^{8}/cm

^{3}

10

^{10}/cm

^{3}

10

^{l2}/cm

^{3}

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

4

6

7

8

⇒ In one of the codes for transfer of numbers the code for the succeeding number differs from that of the number only in the change of a single digit. The code is

ASCII

Excess 3 CODE

Gray CODE

none of these

⇒ Which of the following modes can exist in a rectangular waveguide?

TM

_{10}

TE

_{10}

TM

_{00}

TM

_{01}

⇒ If figure, power dissipated in 30Ω resistance will be maximum when value of

30 Ω

16 Ω

9 Ω

zero

⇒ Which of the following are included in the architecture of computer?

- Addressing mode, design of CPU
- Instruction set, data format
- Secondary memory, operating system

1 and 2

2 and 3

1 and 3

1, 2 and 3

⇒ The oscillator shown in figure

Clapp oscillator

R-C Phase shift oscillator

Hartley oscillator

Colpitt's oscillator

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | Ratio of maximum energy stored to energy dissipated per cycle | 1. | Propagation constant |

B. | TEM mode is loss less medium | 2. | Cutoff frequency is zero |

C. | Ratio of frequency in radian to phase velocity of EM wave | 3. | Quality factor of cavity |

D. | TEM is the mode of lowest cutoff frequency | 4. | Cylindrical waveguide |

A-3, B-2, C-4, D-1

A-2, B-3, C-1, D-4

A-3, B-2, C-1, D-4

A-2, B-3, C-4, D-1

⇒ FIR filter Passes __________ Phase.

non-linear phase

linear phase

variable phase

none

⇒ 1101

_{2}- 1001

_{2}=

1000

100

10

1

⇒ Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after SBI 0B7H?

12 H, 0

12 H, 1

DDH, 0

DDH, 1

⇒ In the basic series inverter circuit, the source supplies load

only in positive half cycle

both in positive and negative half cycles

only in part of positive half cycle

in positive half cycle and part of negative half cycle

⇒ The integral of a unit step function is

an impulse function

a ramp function

a ramp function of slope 1

none of these

⇒ If L [

*f*(

*t*)] = F(

*s*), L

*f*(

*t*- T)

*e*

^{sT}F(

*s*)

*e*

^{-sT}F(

*s*)

F(

*s*) -

*e*

^{-sT}

F(

*s*) +

*e*

^{-sT}

⇒ At a temperature of about 1 K, aluminium is a

conductor

insulator

photoconductor

superconductor

⇒ A dielectric material must be

insulator

good conductor

resistor

semiconductor

⇒ A dynamometer wattmeter is connected in ac circuit. The reading will be

V-A product

average power

peak power

instantaneous power

⇒ Modified Mc Murray full bridge inverter uses

4 thyristors and 2 diodes

4 thyristors and 4 diodes

8 thyristors and 4 diodes

8 thyristors and 8 diodes

⇒ To ensure that a zener diode does not get destroyed

the applied voltage should not exceed breakdown voltage

the current should not exceed rated current

the current should be less than magnitude of barrier potential

both (a) and (b)

⇒ In the vacuum diode equation

*i*

_{b}=

*ke*

_{b}

^{1.5}, the current is

temperature limited current

space charge limited current

any of the above

none of the above

⇒ A longwave AM broadcast transmitter needs

very small carrier power

very large carrier power

small carrier power

large carrier power

⇒ In the given figure shows a periodic triangular wave. The Fourier series will

all cosine terms

all sine terms

odd cosine terms

odd sine terms

⇒ A single phase full wave regulator feeds R-L load. The best gating signal is

short duration pulses

long duration pulses

pulse train

either (a) or (b)

⇒ In sinusoidal PWM for inverters the width of different pulses are not the same.

TRUE

FALSE

⇒ In digital TV digital imaging standard comprises

six profiles and four levels

four levels and six profiles

six profiles and six levels

four profiles and four levels

⇒ Two sinusoidal waves 1 and 2 have peak values V

_{m1}and V

_{m2}. Wave 1 is leading wave 2 by ∠θ. Which of the following is correct?

*v*

_{1}= V

_{m1}sin θ and

*v*

_{2}= V

_{m2}cos θ

*v*

_{1}= V

_{m1}sin ω

*t*and

*v*

_{2}= V

_{m2}sin (ω

*t*- θ)

*v*

_{1}= V

_{m1}sin (ω

*t*+ θ/2) and

*v*

_{2}= V

_{m2}sin ω

*t*

none of the above

⇒ The width of air gap on recording head in a tape recorder is about

6 micron

3 micron

1 micron

25 micron

⇒ Norton's equivalent circuit

is same as Thevenin's circuit

has no relation with Thevenin's circuit

is dual of Thevenin's circuit

is reciprocal of Thevenin's circuit

⇒ In an R-S latch, to set the output to high

R is low and S is high

R and S are high

R and S are low

R is high and S is low