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Q1. | In high frequency region, an amplifier behaves like a |

A. | band pass filter [Wrong Answer] |

B. | low pass filter [Correct Answer] |

C. | high pass filter [Wrong Answer] |

D. | any of the above [Wrong Answer] |

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

⇒ In a FM receiver, amplitude limiter

amplifiers low frequency signals

reduces the amplitude of signals

eliminates any change in amplitude of received FM signals

none of the above

⇒ In the television system in India, the odd and even fields are scanned

25 times each

25 times each but alternately

50 times each

50 times each but alternately

⇒ The baud rate is

always equal to the bit transfer rate

equal to twice the bandwidth of an ideal channel

not equal to the signalling rate

equal to one half the bandwidth of ideal channel

⇒ In a bipolar transistor, the base collector junction has

forward bias

reverse bias

zero bias

zero or forward bias

⇒ A sinusoidal voltage is written as

*v*= I

_{m}(R

^{2}+ X

_{C}

^{2})

^{0.5}sin 314

*t*. Its peak value and frequency are

I

_{m}and 50

I

_{m}(R

_{2}+ X

^{2}

_{C})

^{0.5}and 50

0.707 I

_{m}(R

_{2}+ X

^{2}

_{C})

^{0.5}and 50

2 I

_{m}(R

_{2}+ X

^{2}

_{C})

^{0.5}and 50

⇒ The current source in figure, can be replace

a voltage source of 20 V in series with 5 ohm resistance

a voltage source of 16 V in series with 4 ohm resistance

a voltage source of 20 V in series with 4 Ω resistance

a voltage source of 16 V in series with 5 Ω resistance

⇒ Given below a block diagram of oscillator circuit with various reactance elemen

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= C

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= L

*x*

_{1}= C,

*x*

_{2}= C,

*x*

_{3}= L

*x*

_{1}= L,

*x*

_{2}= C,

*x*

_{3}= L

⇒ MEWS stands for

Missile Early Warning System

Moving Target Early warning System

Missile Early Warning Signal

Moving Target Early Warning Signal

⇒ The zeros of a minimum phase function lie on

imaginary axis

left half plane or origin

left half plane or imaginary axis

right half plane or origin

⇒ An extrinsic semiconductor sample has 6 billion silicon atoms and 3 million pentavalent impurity atoms. The number of electrons and holes is

3 million each

6 billion each

3 million free electrons and very small number of holes

3 million holes and very small number of free electrons

⇒ The following circuit is implementation of

- Sum of full adder
- Carry of half adder
- Difference of full subtractor <

(i) only

(iii) only

(ii) only

(i) and (ii)

⇒ Examine the following truth table. The product of sum from this truth tabl

(X + Y) (X + Y)

(X + Y) (X + Y)

(X + Y) (X + Y)

(X + Y) (X + Y)

⇒ If

*f*(

*t*) = -

*f*(-

*t*) and

*f*(

*t*) satisfies Dirichlet conditions, then

*f*(

*t*) can be expanded in Fourier series having

sine terms only

cosine terms only

cosine and constant terms

sine and constant term

⇒ Am equivalent 2's complement representation of the 2's complement number 1101 is

110100

1101

110111

111101

⇒

Match the following:

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

A. | Television | 1. | Either AM or FM used |

B. | Radio | 2. | Both AM and FM are used |

C. | Radar | 3. | PCM is used |

D. | Data Communication | 4. | Digital system |

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

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

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

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

⇒ Which of the following stages has no phase inversion of the signal?

Two CE stages

Three CE stages

CE and CC stages

CE stage and emitter follower

⇒ In a Darlington pair

the emitter of first transistor drives the base of the second

the base of the first transistor drives the emitter of the second

emitters of the two transistors are connected through a resistor

none of the above

⇒ A wire has a resistance R ohm. If another wire of the same material and same weight has double the diameter (as compared to the first wire), the resistance of the second wire will be

0.5 R

0.25 R

0.125 R

R/16

⇒ If 10 V is the peak voltage across the secondary of the transformer in a half wave rectifier (without any filter circuit), then the maximum voltage on the reverse biased diode will be

20 V

14.14 V

10 V

7.8 V

⇒ In the given figure shows a logic circuit. The minimum Boolean expression for this circui

A + B

A + B + C

AB + C

AB + AC + BC

⇒ In a good voltage amplifier, its input impedance

must be high compared to the resistance of the source

must be low compared to the resistance of the source

must be equal to the resistance of the source

must be half the resistance of the source

⇒ Which is not purpose of modulation?

Effective radiation

Multiplexing

Narrow band

Increase in signal power

⇒ The peak factor is the ratio of

peak and rms values

peak and average values

rms and average values

none of the above

⇒ The two orientations of worksheet page are called

portrait and landscape

auto text and auto correct

font and footer

header and footer

⇒ IC 7485 cannot be cascaded.

TRUE

FALSE

⇒ The permanent magnet field system of brushless dc servo- motor is generally on

stator

rotor

partly on stator and partly on rotor

either (a) or (b)

⇒ A radio station works at 800 kHz and uses AM. If this is a public broadcast system, it should transmit using

parabolic reflector to transmit all round

turnstile antenna for the required land

half wave long horizontal wave

a vertical antenna less than quarter for practical reasons

⇒ Stepper motors find applications in

X-Y plotters

numerically controlled machining equipment

printers

all of the above

⇒ The impedance inversion may be objected with

a short-circuited stub

an open-circuited stub

a half-wave line

a quarter-wave line

⇒ A network N is dual of network N if

both of them have same mesh equation

both of them have same node equation

mesh equation of one are the node equations of the other

KCL and KVL equations are the same