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Q1. | In figure V_{i} may vary from 15 to 20 V and load current may vary from 20 mA to 100 mA. Suitable maximum value of |

A. | 20 Ω [Wrong Answer] |

B. | 50 Ω [Correct Answer] |

C. | 100 Ω [Wrong Answer] |

D. | 200 Ω [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 write cycle time of memory is 200 nsec. The maximum rate of data which can be stored is

200 words/sec

5 x 10

^{3}words/sec

5 x 10

^{6}word/sec

5 x 10

^{9}words/sec

⇒ Which of the following pulse communication system is inherently immune to noise?

PPM

PCM

PWM

PAM

⇒ Figure shows the feedback network of one of the very popular types of sinusoidal oscillators. Which one is t

Weinbridge oscillator

Hartley oscillator

Colpitt's oscillator

R-C phase shift oscillator

⇒ Holes and electrons move in opposite directions.

TRUE

FALSE

⇒ For an RC admittance function Y,

Y(∞) < Y(0)

Y(0) < Y(∞)

Y (∞) may be lesser or greater than Y(0)

Y(∞) = Y(0)

⇒ The degradation of satellite solar cells with time is mainly due to

their bombardment by electrons

collection of meteoric dust

increase in resistivity of silicon

gradual leakage of charge carriers from the semiconductor material

⇒ For a low level AM system, the amplifiers modulated stage must be

linear devices

harmonic devices

class C amplifiers

non-linear devices

⇒ The properties of FETs closely resemble those of a

thermionic valve

P-N-P transistor

N-P-N transistor

UJT

⇒ A number is expressed in binary 2's complement as 10011 decimal equivalent value is

19

13

-19

-13

⇒ Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.

28000

15000

36000

11100

⇒ In the given figure,

(A + B)C + DE

AB + C(D + E)

(A + B)C + D + E

none of the above

⇒ In household energy meters the flux of series magnet is in phase with current but the flux of shunt magnet lags the voltage by 88°. The reading of energy meters

will be correct

will have a negative error

will have a positive error

may have positive or negative error

⇒ The circuit shown in figure will ac

differentiator

adder

clipper

clamper

⇒

Match the following:

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

A. | Anderson Bridge | 1. | Low resistance |

B. | Kelvin Bridge | 2. | Medium resistance |

C. | Schering Bridge | 3. | Inductance |

D. | Wheatstone Bridge | 4. | Capacitance |

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

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

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

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

⇒ End fire array has narrow bandwidth.

TRUE

FALSE

⇒ If E is energy level of electron and E

_{F}is Fermi level, then

all quantum states with E less than E

_{F}will be occupied at T = 0

all quantum states with E less than E

_{F}will be empty at T = 0

some quantum states with E less than E

_{F}will be occupied at T = 0

none of the above

⇒ In a FM signal, the modulation index increases, then the power

increases

decreases

remains constant

none of the above

⇒ A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with ε

_{r}= 4. The reflection coefficient for the normal incidence is

zero

0.5 ∠180°

0.33 ∠0°

0.33 ∠180°

⇒ SSB-SC stands for

Single Side Band-Suppressed Carrier

Single Side Band-Synchronous Carrier

Synchronous Side Band-Suppressed Carrier

Synchronous Side Band-Self Carrier

⇒ During transmission over a communication channel, bit errors occur independently with probability P. If a block of

*n*bits is transmitted, the probability of at most one bit error is equal to

1 - (1 - P)

^{n}

P + (

*n*- 1) (1 - P)

*n*P (1 - P)

^{n - 1}

(1 - P)

^{n}+

*n*P (1 - P)

^{n - 1}

⇒ In the given figure shows a 10dB directional coupler. If power input at port 1 is 100 mW, power output at port

10 mW

15 mW

20 mW

25 mW

⇒ Which memory is available in all technologies?

PROM

EEPROM

ROM

EPROM

⇒ When all the seven segments of a display are energized, the number shown is

0

1

7

8

⇒

Match the following:

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

A. | Copper | 1. | produces discrete energy level just above valence band |

B. | Rubber | 2. | produces discrete energy level just below conduction band |

C. | Antimony | 3. | large forbidden gap |

D. | Boron | 4. | valence and conduction bands overlap |

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

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

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

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

⇒ A permanent magnet moving coil measures

true rms value

dc value

peak value

rms plus dc value

⇒ - 56 is not a valid real constant in Fortran.

TRUE

FALSE

⇒ The speed transducer using a drag cup rotor has the main advantage of

very high accuracy

low energy requirement

cheap construction

all of the above

⇒ A geostationary satellite

is located at a height of 358, 00 km

appears stationary over earth's magnetic pole

is motionless in space but keeps spinning

orbits the earth within a 24 hour period

⇒ Probability density function of thermal noise is

Poisson

Binomial

Gaussian

None of the above

⇒

`JCOKE`

8

11

16

20

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