Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | In the amplifier circuit of figure h_{fe} = 100 and h_{ie} = 1000 Ω. The voltage gain of amplifier is a |

A. | 0.33 [Wrong Answer] |

B. | 0.5 [Wrong Answer] |

C. | 0.66 [Wrong Answer] |

D. | 1 [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 :**

⇒ For the time domain response shown in figure the

lies on negative real axis

lies on positive real axis

lies on imaginary axis

is complex or imaginary

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

TRUE

FALSE

⇒ For the given truth table, the correct Boolean expressio

XYZ + X YZ + X Y Z

X Y Z + XYZ + X YZ

X Y Z + XYZ + XY Z

XYZ + XYZ + XY Z

⇒ In figure, the steady state current through 1H inductanc

Zero

0.125

0.208333333333333

0.25

⇒ Pick the odd one out

PPM

PDM

PWM

PLM

⇒ Distances near the skip distance should be used for sky-wave propagation

to avoid the Faraday effect

to avoid tilting

to prevent sky-wave and upper ray interference

so as to exceed the critical frequency

⇒ As the diameter of a wire is doubled, the resistance becomes

twice

one half

one fourth

four times

⇒ The signal input to a given amplifier is made up of 100 mΩ signal power and 1 mΩ noise power. The amplifier contributes an additional 100 mΩ of noise and has a power gain of 20 dB. The output signal-to-noise ratio is

100

50

10

5

⇒ An FM transmitter delivers 80W to a load of 30 W when no modulation is present. The carrier is now frequency modulated by a single sinusoidal signal and the peak frequency deviation is so adjusted to make the amplitude of the second sideband is zero in the given out

84 W

97.44 W

100 W

77.44 W

⇒ In a 3 phase full converter, the firing angle is less than 60°. The instantaneous output voltage

will have positive part only

will have both positive and negative parts

may have both positive and negative parts

will have negative part if load is inductive

⇒ A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the wave impedance for dominant mode.

130 p

1.3 p

120 p

12 p

⇒ Which of the following noise becomes of great importance at high frequencies?

Shot noise

Agitation noise

Flicker noise

Transit time noise

⇒ A sine wave is passed through an amplifier which severely limits it symmetrically. If then passes to a second amplifier which is narrow band and tuned to the frequency of the original sine wave. What will be the output wave from this second amplifier?

A square wave of the same frequency as that of the original sine wave

A square wave of double the frequency of that of original sine wave

A sine wave of constant amplitude at the frequency of the original sine wave

A sine wave of constant amplitude at double frequency of the original sine wave

⇒ Transit time is considered as significant at

HF

MF

LF

all of the above

⇒ Ferrites are

hard materials

brittle materials

not easily machinable

materials with all above properties

⇒ Measurement of an unknown voltage with a dc potentiometer loses its advantage of open circuit measurement when

the primary circuit battery is changed

standardization has to be done again to compensate for drifts

voltage is larger than range of the potentiometer

range reduction by a factor of 10 is employed

⇒ In a 4 bit ripple counter using flip flops with

*t*= 40 ns, the maximum frequency can be

_{pd}1.25 MHz

3.25 MHz

6.25 MHz

12.5 MHz

⇒ In a 3 phase bridge inverter with 120° mode of operation the. number of thyristors conducting at one time are

1

2

3

4

⇒ In 8085 microprocessor, which of the following interrupts has the lowest priority?

RST 5.5

RST 7.5

TRAP

INTR

⇒ In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is

assignment, relational, arithmetic

relational, assignment, arithmetic

arithmetic, assignment, relational

arithmetic, relational, assignment

⇒ The terms RMS and average values apply only to sine waves.

TRUE

FALSE

⇒ What happens when forward bias is applied to a junction diode?

Majority carrier current is reduced to zero

Minority carrier current is reduced to zero

Potential barrier is increased

Potential barrier is decreased

⇒ The secondary lobes in binomial arrays can be reduced by

maintaining spacing between two consecutive radiating sources less than λ/2

maintaining the amplitudes in radiating sources, from outer towards the centre source, proportional to the coefficients of the successive terms of the binomial series

both (a) and (b)

none of the above

⇒ An R-L series circuit has R = 5 Ω and L = .01 H. It is fed by ac 50 Hz supply. The rms current in the circuit is 5 A. The active power supplied by the source is

25 W

50 W

125 W

250 W

⇒ The phenomenon of creep occurs in

energy meters

voltmeters

ammeters

wattmeters

⇒ Consider the following features:

- negative operands cannot be used
- when immediate operand changes, the program should be reassembled
- the program is difficult to read
- the size of operand is restricted by word length of the computer

1 and 2

2 and 4

2 and 3

1 and 4

⇒ The realization of the term Ks yields

a resistance of value K ohms

a capacitances of value K farads

an inductance of value k farads

either (b) or (c)

⇒ The maximum power that can be transferred to the load is resistor R

_{L}from the voltage source in the figur

1 W

10 W

0.25 W

0.5 W

⇒ A single phase semiconverter has a freewheeling diode. If the firing angle is a and the load is purely resistive, the periods of conduction and freewheeling respectively are

p - a and 0

p - a and a

p + a and 0

p + a and a

⇒ Which of the following is an indirect method of generating FM?

Reactance BJT modulator

Armstrong modulation

Varactor diode modulation

Reactive FM modulator