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Q1. | Which of the following constitutes an active component? |

A. | Semiconductor device [Correct Answer] |

B. | Resistors [Wrong Answer] |

C. | Capacitors [Wrong Answer] |

D. | Inductors [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ A short circuited stub is preferred to an open circuited stub because an open circuited stub

is more difficult to fabricate and construct

is made of transmission line of different

*Z*

_{0}

is liable to radiate

is incapable of giving full range of reactance

⇒ Loudness control gives

high boost to bass and little boost to treble

equal boost to bass and treble

less boost to bass and more boost to treble

less boost to both bass and treble

⇒ Assume that

*x*= 5 and

*y*= 2. Then in Java operation

*x*+ =

*y*, the result is

*x*= 7

*x*= 2

*x*= 3

*x*= 2

⇒ The binary number 101100.110 in octal number will be

152.6

154.6

145.6

174.6

⇒ Which of the following is not a valid logical expression in Pascal?

A > = B

A < = B

A = < B

A < > B

⇒ A rectangular pulse is passed through an L.P.F. The response is a

triangular

trapezoidal function

sampling

Both (a) and (b)

⇒ What is typical bandwidths of a 2-wire telephone line?

300 Hz to 3.4 kHz

20 Hz to 4 kHz

dc to 4 kHz

20 Hz to 20 kHz

⇒ In Z

_{RC}(

*s*) = 0 at

*s*= ∞, the last element in first Cauer form is

R

C

R and C in series

R and C in parallel

⇒ A single phase half wave rectifier circuit has a free wheeling diode. The free wheeling diode will conduct only if

load is purely resistive

load is purely inductive

load is combination of R and L

load is purely inductive or combination of R and L

⇒ LVDT is used to measure

displacement

pressure

temperature

any of the above

⇒ In a FM waveform, the side bands are spaced at intervals equal to

four times the modulating frequency

twice the modulating frequency

half the modulating frequency

modulating frequency

⇒ The parameter A of a two port network is equal to

V

_{2}/V

_{1}with I

_{1}= 0

V

_{1}/I

_{2}with V

_{2}= 0

I

_{1}/I

_{2}with V

_{2}= 0

V

_{1}/V

_{2}with I

_{2}= 0

⇒

**Assertion (A):** A half cycle of sine wave can be expressed as sum of sine wave and another sine wave shifted by *T*/2 where T is the time period.

**Reason (R):** The function *u*(*t* - *t*_{0}) - *u*(*t* - *t*_{0} - T) is a gate function occuring at *t* = *t*_{0} and of duration T.

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

⇒

Match the following:

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

A. | Mu Metal | 1. | very high magnetic permeability |

B. | Samrium/cobalt | 2. | very high magnetic remanence |

C. | Sapphire | 3. | very high thermal conductivity |

D. | Ferrites | 4. | very stable magnetic permeability |

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

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

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

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

⇒ The electrical power to a megger is provided by

battery

inverter

permanent magnet dc generator

ac generator

⇒ If V

_{a1}= V

_{a2}= 100 V and V

_{a0}= 0, then V

_{a}, V

_{b}, V

_{c}are

200, -100 and -100 V

100, 100, 300 V

200, 100, 100 V

100, -100, 100 V

⇒ For a 50 Ω resistor for 3 GHz application, the stray capacitance should be less than

1 μ

*F*

1

*nF*

1

*p*

*F*

0.1

*pF*

⇒ Turn off time of a transistor switch is equal to (where

*t*

_{s}is storage time and

*t*

_{f}is fall time.)

*t*

_{s}+

*t*

_{f}

*t*

_{s}-

*t*

_{f}

2

*t*

_{s}

2

*t*

_{f}

⇒ A system with transfer function H(

*z*) has impulse response

*h*(.) defined as

*h*(2) = 1,

*h*(3) = -1 and

*h*(

*k*) = 0 otherwise. Consider the following statem

Only S2 is true

Both S1 and S2 are false

Both S1 and S2 are true, and S2 is a reason for S1

Both S1 and S2 are true, but S2 is not a reason for S1

⇒ 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

⇒ The function in the given figure can be writte

*u*(

*t*- 1) sin p (

*t*- 1) -

*u*(

*t*- 3) sin p (

*t*- 3) +

*u*(

*t*- 4) sin p (

*t*- 4) -

*u*(

*t*- 6) sin p (

*t*- 6)

*u*(

*t*- 1) sin p (

*t*- 1) -

*u*(

*t*- 3) sin p (

*t*- 3) +

*u*(

*t*- 4) sin p (

*t*- 4)

*u*(

*t*- 1) sin p (

*t*- 1) +

*u*(

*t*- 4) sin p (

*t*- 4)

*u*(

*t*- 1) sin 2p (

*t*- 1) +

*u*(

*t*- 4) sin 2p (

*t*- 4)

⇒ Which characteristics of a memory chip is called dc characteristics?

Organisation

Timing characteristics

Physical dimensions

Power consumption and bus loading

⇒ A rectangular waveguide having TE

_{10}mode as dominant mode is having a cut off frequency of 18 GHz for the TE

_{30}mode. The inner broad wall dimension of the rectangular waveguide is

5/3 cm

5 cm

5/2 cm

10 cm

⇒ Which of the following produces upper and lower side frequencies?

Microphone

Demodulator in a superheterodyne receiver

Modulator in a. radio transmitter

Oscillator in a receiver

⇒ A 10 km long line has a characteristic impedance of 400 ohms. If line length is 100 km, the characteristic impedance is

4000 Ω

400 Ω

40 Ω

4 Ω

⇒ In a rectangular waveguide Z

_{TE}. Z

_{TM}is

η

_{0}

^{2}

1

1/ η

_{0}

^{2}

η

_{0}

⇒ To produce magnetic flux, mmf is necessary.

TRUE

FALSE

⇒ In metals the valence electron wave functions are strongly perturbed by the presence of neighbouring atoms.

TRUE

FALSE

⇒ In a multiphase chopper, the different choppers operate in

series and all simultaneously

parallel and one at a time

parallel and simultaneously

either (b) or (c)

⇒ Audio and video signals are called modulating waves.

TRUE

FALSE