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Q1. | The number of stator field windings in an ac tachometer are |

A. | 1 [Wrong Answer] |

B. | 2 [Correct Answer] |

C. | 3 [Wrong Answer] |

D. | 4 [Wrong Answer] |

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

⇒ Saturation region of a JFET is also known as

source region

analog region

pinch off region

ohmic region

⇒ In a rectangular waveguide

the broad width is generally labelled '

*a*' and height '

*b*'

the broad width is generally labelled '

*b*' and height '

*a*'

any one of the dimensions may be labelled '

*a*' and the other '

*b*'

the length is labelled as '

*a*'

⇒ The switch in the circuit shown was on position

*a*for a long time, and is moved to position

*b*at time

*t*= 0. The current

*i*(

*t*) for

*t*> 0 is give

0.2

*e*

^{-125t}

*u*(

*t*) mA

20

*e*

^{-1250t}

*u*(

*t*) mA

0.2

*e*

^{-1250t}

*u*(

*t*) mA

20

*e*

^{-1000t}

*u*(

*t*) mA

⇒ To determine the polarity of voltage drop across a resistor, it is sufficient to know

direction of current through the resistor

direction and magnitude of current through the resistor

direction and magnitude of current and value of resistance

magnitude of current through the resistance

⇒ If the variance σ

_{x}

^{2}of

*d*(

*n*) =

*x*(

*n*) -

*x*(

*n*- 1) is one-tenth the variance σ

_{x}

^{2}of a stationary zero mean discrete time signal

*x*(

*n*), then the normalized autocorrelation function R

_{xx}(

*x*)/σ

_{x}

^{2}at

*k*= 1 is

0.95

0.9

0.1

0.05

⇒ In measurements using strain gauge, the dummy strain gauge is used to

compensate for resistance of strain gauge

compensate for change in temperature

compensate for error due to change in voltage of battery

compensate for error in voltmeter

⇒ The voltage gains of an amplifier without feedback and with negative feedback respectively are 100 and 20. The percentage of negative feedback would be.

0.4

0.05

0.2

0.8

⇒ In which of the following semiconductor are holes majority carriers

intrinsic

extrinsic

*p*type

*n*type

⇒ A typical signal strength received from a geosynchronous communication satellite is of the order of a few

milliwatts

kilowatts

picowatts

watts

⇒ The work done in moving a charge Q on an equipotential line for a distance

*d*will be

V/

*d*

QV/

*d*

Q.

*d*

zero

⇒ In integral cycle control of ac regulator, the input power factor is equal to

duty cycle a

a

^{2}

a

(a)

^{1/3}

⇒ In figure, V

_{G2.22 V22.2 V0.22 V0.022 V}

⇒ In cell communication

carrier frequency change

carrier frequency constant

depend upon location

depend upon geographical area

⇒ The total lumens emitted by a source of 1 candle are

0.4 p

4 p

2 p

8 p

⇒ The first and the last critical frequency of an

*RC*driving point impedance function must respectively by

a zero and a pole

a zero and a zero

a pole and a pole

a pole and a zero

⇒ In a valence crystal, the valence electrons

are not shared

are shared between neighbouring atoms

are shared by all atoms

any of the above

⇒ In a line VSWR of a load is 6 dB. The reflection coefficient will be

0.033

0.33

0.66

3.3

⇒

**Assertion (A):** Intrinsic resistivity of silicon is lower than that of germanium.

**Reason (R):** Magnitude of free electron concentration in germanium is more than that of silicon.

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

⇒ In a single phase power factor meter the phase difference between currents in the two pressure coils is

exactly 0°

approximate 0°

exactly 90°

approximate 90°

⇒ In an amplifier if conductor during the cycle is from 0 to 90° and again from 180° to 270°, the amplifier will be termed as

class A

class B

class C

class AB

⇒ Which of the following should dominant wave have?

Lowest cut off frequency

Highest cut off frequency

No attenuation

No phase shift

⇒ A linear diode detector uses RC filter. As modulation index increases the maximum permissible value of time constant RC

increases

decreases

remains constant

either (a) or (c)

⇒ Bit is

smallest piece of electronic hardware

a drilling tool

an abbreviation for binary digit

the smallest number

⇒ The two conductors of a single phase transmission line suspended in air carry currents in opposite directions. The force per unit length on each conductor varies

directly as the current in either conductor

directly as the distance between the two conductors

directly as the square of the current in either conductor

inversely as the square of the distance between the two conductors

⇒

Match the following:

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

A. | Poles and zeros of lie an real axis driving point LC network | 1. | lie an real axis |

B. | Canonic LC network has | 2. | a zero |

C. | The number of Canonic networks for the given driving point function | 3. | minimum number of elements |

D. | The first critical frequency nearest the origin for RL driving point impedance | 4. | four |

5. | minimum number of elements | ||

6. | alternate | ||

7. | either a pole or zero | ||

8. | three |

A-1, B-5, C-8, D-7

A-6, B-5, C-3, D-2

A-1, B-5, C-4, D-2

A-1, B-3, C-4, D-7

⇒ The emf of a Weston cell is 1.286 V.

TRUE

FALSE

⇒ In a 4 bit full adder how many half adders and OR gates are required

8 and 4

7 and 4

7 and 3

8 and 3

⇒ The polar plot of G(

*j*ω) = 1/

*j*ω is

positive imaginary axis

positive real axis

negative imaginary axis

negative real axis

⇒ In satellite communication, frequency modulation is used because satellite channel has

small bandwidth and negligible noise

large bandwidth and severe noise

maximum bandwidth and minimum noise

high modulation index

⇒ For the network in figure, the correct loop equation for loop

-I

_{1}+ 4I

_{2}+ 11I

_{3}= 0

I

_{1}+ 4I

_{2}+ 11I

_{3}= 0

-I

_{1}- 4I

_{2}+ 11I

_{3}= 0

I

_{1}- 4I

_{2}+ 6I

_{3}= 0