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Q1. | Which is not purpose of modulation? |

A. | Effective radiation [Wrong Answer] |

B. | Multiplexing [Wrong Answer] |

C. | Narrow band [Wrong Answer] |

D. | Increase in signal power [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 :**

⇒ To measure a resistance of about 8 ohms we should use

Kelvin's double bridge

Wheatstone bridge

Meggar

Either (b) or (c)

⇒ Magnetic susceptibility of a medium is the ratio of

magnetic field strength to mmf

intensity of magnetization to magnetic flux density

intensity of magnetization to field strength

mmf to magnetic field strength

⇒ The advantage of modified series inverter with two inductors and two capacitors is

the intermittent operation of battery is avoided

efficiency of circuit is more

the output frequency is low

all of the above

⇒ A logarithmic amplifier has diode in the feedback path.

TRUE

FALSE

⇒ In the given figure 15.6 shows a series, R - C circuit fed by a current source

*i*(

*t*). There is an initial voltage

*v*

_{0}. across the capacitor. The sy

is linear

is non linear

may be linear or non linear

is linear only if

*v*

_{0}is zero

⇒

**Assertion (A):** Heaviside partial expansion gives a simple procedure to find inverse Laplace transform of the terms having a complex conjugate pair of roots.

**Reason (R):** If I(*s*) = P(*s*)/Q(*s*) and all roots of Q(*s*) = 0 are simple, *i*(*t*) will have terms with exponentials having real exponents only.

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

⇒ The resistance values of a PIN diode under positive bias and negative bias respectively are about

a few ohms and a kilo ohms

about 100 ohms and 1000 ohms

about 0.1 ohm and 100 ohms

about 1000 ohms and 10000 ohms

⇒

**Assertion (A):** A class C amplifier can also be used as frequency multiplier

**Reason (R):** When narrow current pulses drive a resonant circuit the output can be a near perfect sine wave

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ If B, H and M denote flux density, field intensity and magnetisation, B = μ

_{0}(H + M).

TRUE

FALSE

⇒ For a BJT a = 0.98, then β =

0.02

0.5

4.9

48

⇒ Consider the resonant circuit as shown b

R = 10

^{4}L = 5 μH C = 20 pF

1000 L = 50 μH C = 200 pF

10 K L = 50 μH C =20 pF

None of these

⇒ If zeros at infinity are included in the count, the number of zeros of G(

*s*) H(

*s*) is

equal to number of poles

one more than the number of poles

one less than the number of poles

none of the above

⇒ In a 3 input NOR gate, the number of states in which output is 1 equals

1

2

3

4

⇒ Which of these are 16 bit microprocessors?

80286

MC68000

Z8000

All

⇒ In case of probability of the message is 1 to 16 then the information will be

16 bits

8 bits

4 bits

2 bits

⇒ In a travelling wave tube distributed interaction between an electron beam and a travelling wave takes place

TRUE

FALSE

⇒ Two wattmeter method is suitable only for balanced loads.

TRUE

FALSE

⇒

Match the following:

List I (Symbol in Java comparison operator) | List II (Meaning) | ||
---|---|---|---|

A. | = = | 1. | Greater than or equal to |

B. | ! = | 2. | Equal |

C. | > = | 3. | Not equal |

A-1, B-2, C-3

A-3, B-2, C-1

A-1, B-3, C-2

A-2, B-3, C-1

⇒ EEPROM is also known as

UVPROM

EAPROM

both UVPROM and EAPROM

none of the above

⇒ Which of the following is correct?

*y*

_{22}=

*z*

_{22}/|

*z*|

*y*

_{11}=

*z*

_{22}/|

*z*|

*z*

_{11}=

*y*

_{11}/|

*y*|

*z*

_{22}=

*y*

_{22}/|

*y*|

⇒ The ripple factor of power supply is a measure of

its filter efficiency

diode rating

its voltage regulation

purity of power output

⇒ The static equalisation circuit for thyristors connected in series is

one resistor in series with each thyristor

one resistor in parallel with each thyristor

one resistor and one capacitor in parallel with each thyristor

none of the above

⇒ For a transistor if a

_{dc}= 0.98 and emitter current

*I*

_{E}is 2

*mA*, then collector current will be

0.44 mA

0.88 mA

1.96 mA

3.32 mA

⇒ At room temperature, a possible value for the mobility of electrons in the inversion layer of a silicon

*n*-channel MOSFET is

450 cm

^{2}/V-s

1350 cm

^{2}/V-s

1800 cm

^{2}/V-s

3600 cm

^{2}/V-s

⇒ A nibble corresponds to

2 successive bits of data

4 successive bits of data

8 successive bits of data

16 successive bits of data

⇒ A continuous time LTI system is describe

(

*e*-

^{t}*e*

^{3t})

*u*(

*t*)

(

*e*

^{-t}- 3

*e*

^{-3t})

*u*(

*t*)

(

*e*

^{-t}+

*e*

^{-3t})

*u*(

*t*)

(

*e*

^{t}+

*e*

^{3t})

*u*(

*t*)

⇒ If the intermediate frequency of a superheterodyne receiver falls within the tuning range of the receiver

Unsuitability will occur

Heterodyne whistles will be heard

Tuning to the frequency band immediately adjacent to the intermediate frequency will become impossible

All of the above

⇒ A transistor has a maximum power dissipation of 350 mW at an ambient temperature of 25°C. If derating factor is 2 mW/°C, the maximum power dissipation for 40°C ambient temperature is

300 mW

330 mW

350 mW

380 mW

⇒ An atom of a rare gas is placed is an electric field E. Then

the nucleus will be shifted in the direction of E by an amount which is proportional to E.

the nucleus will not be shifted.

the nucleus will be shifted in the direction of E by an amount which is independent of E.

the nucleus will be shifted in a direction opposite to that of E.

⇒ Which of the following transducers is most suitable for monitoring continuous variations in very fine thickness of a material?

Diaphragm

Capacitor

L.V.D.T.

Piezoelectric crystal.