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Q1. | In an ac circuit, the maximum and minimum values of power factor can be |

A. | 2 and 0 [Wrong Answer] |

B. | 1 and 0 [Correct Answer] |

C. | 0 and -1 [Wrong Answer] |

D. | 1 and -1 [Wrong Answer] |

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

⇒ In figure, I

_{D}= 4 mA. Then V

_{D20 V10 V30 V1 V}

⇒ Which of the following theorems can be conveniently used to find power consumed in 10 Ω resistor in fig

Thevenin theorem

Maximum power transfer theorem

Millman's theorem

Superposition theorem

⇒ 1 dB is equal to __________ nepier

8.6

6.8

8

0

⇒ Efficiency of class A power amplifier is very poor.

TRUE

FALSE

⇒ A differential amplifier is invariably used in the I/P stage of all OP-amps. This is done basically to produce the OP-amp with a very high.

CMRR

bandwidth

slew rate

open-loop gain

⇒

Match the following:

List I (type of controller) | List II (Operation) | ||
---|---|---|---|

A. | Pneumatic controller | 1. | Flexible operation |

B. | Hydraulic controller | 2. | High torque high speed operation |

C. | Electronic controller | 3. | Fire and explosion proof operation |

A-1, B-3, C-2

A-1, B-2, C-3

A-3, B-1, C-2

A-3, B-2, C-1

⇒ The minimum decimal equivalent of the number 11C0 is

183

194

268

269

⇒ In a radio receiver, if the intermediate frequency is too high

Selectivity will be poor

Tracking difficulties will be least

Adjacent channel rejection will improve

All of the above will occur

⇒ For the binary number 11101000, the equivalent hexadecimal number is

F 9

F 8

E 9

E 8

⇒

**Assertion (A):** When a wattmeter is used for low impedance loads, the pressure coil is connected across the load.

**Reason (R):** A wattmeter measures apparent power.

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 R is false

A is false R is true

⇒ A

_{16}X 2

_{16}__________ .

16

_{16}

15

_{16}

14

_{16}

13

_{16}

⇒ The name modem is a contraction of terms modulator demodulator.

TRUE

FALSE

⇒ The input gate current of FET is closer to

few amperes

few milli amperes

few microamperes

negligibly smaller value

⇒ 4 point DFT for

*x*(

*n*) = {2, - 1, 2, 3} is

{6, 4 - 2

*j*, 2, 2

*j*}

{6, 4

*j*, 2, - 4

*j*}

{6, -1 + 3

*j*, 4 - 4

*j*, 4 - 2}

{6, 2

*j*, 4 - 2

*j*, - 2 + 2

*j*}

⇒ Which one of the following can be used as parallel to series converter?

Decoder

Digital counter

Multiplexer

Demultiplexer

⇒ In orthogonal BFSK. the energy of information bearing term is :

the same as total transmitted energy

one half of total transmitted energy

one fourth of total transmitted energy

None

⇒ Impedance Z as shown in the given figur

*j*29 Ω

*j*9 Ω

*j*19 Ω

*j*35 Ω

⇒ Which of the following is not a valid variable name in C?

*p*_

*ce*1

1

*p*_

*ce*

*p*1_

*ce*

*p*_

*ced*

⇒ If J, I and a denote current density, current and area of cross section of a conductor, then

J = Ia

J = I/a

^{2}

J = I/a

J = Ia

^{2}

⇒ For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

TRUE

FALSE

⇒ As per Hartley law

redundancy is essential

it is necessary to use only binary codes

maximum rate of information transmission depends on the channel bandwidth

the maximum rate of information depends on depth of modulation

⇒ CMRR of an op-amp is about 0.1.

TRUE

FALSE

⇒ In load commutated chopper, the commutating element

is capacitor

is capacitor and inductor

is capacitor, inductor and auxiliary thyristor

any of the above depending on load

⇒ Drift velocity of electrons is generally less than 1 mm/s.

TRUE

FALSE

⇒ Point out the false statem

Building, for the time, a body-stabilized geosynchronous communication satellite with its own apogee propulsion and control systems

Attitude control and station management operations for a geostationary satellite

Building launching rocket Ariane for putting APPLE in orbit

Domestic communications on an experimental basis

⇒ (29)

_{13}÷ (29)

_{12}x (29)

_{x}= (23)

_{16}Find

*x*

11

12

13

16

⇒ Which one of the following is applicable to any network-linear or non-linear, active or passive, time-varying or invariant - as long as Kirchhoff laws are

*not*violated?

Tellegen's theorem

Reciprocity theorem

Maximum power transfer theorem

Superposition theorem

⇒ A system has 12 poles or 2 zeros. Its high frequency asymptote in its magnitude plot has slope of

-200 dB/decade

-240 dB/decade

-280 dB/decade

-320 dB/decade

⇒ A major advantage of TWT over a Klystron lies in its

higher bandwidth

higher gain

higher frequency

higher output

⇒ For the system in the given figure G varies slightly, the ratio of open loop sensitivity to closed loop sensitivit

1 : (1 + GH)

1 : (1 + GH)

^{-1}

1 : (1 - GH)

1 : (1 - GH)

^{-1}