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Q1. | A voltage multiplier circuit, using diodes and capacitors is suitable for |

A. | high voltage high current device [Wrong Answer] |

B. | high voltage low current device [Correct Answer] |

C. | low voltage low current device [Wrong Answer] |

D. | low voltage high current device [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ In a radio receiver with simple AGC

the highest AGC voltage is produced between stations

an increase in signal strength produces more AGC

the audio stage gain is normally controlled by AGC

the faster the time constant of AGC, more accurate the output

⇒ If

*x*

*= 2*

_{k}*for*

^{k}*k*≤ 0 and = 0 for

*k*> 0 X(

*z*) = 2/(2 -

*z*).

TRUE

FALSE

⇒ The number of cells in a 4 variable K map is

16

8

4

32

⇒ In 8085 microprocessor based system running at 3 MHz clock frequency what should be the minimum pulse width of the INTR signal, so that it is recognized successfully?

0.33 μs

0.666 μs

5.8 μs

none of these

⇒ The atomic number of silicon is 14. It can be therefore concluded that

a silicon atom contains 14 protons

a silicon atom contains 14 neutrons

a silicon atom contains 14 electrons

all of the above

⇒ If a function Z(

*s*) has a pole at infinity, then

the degrees of numerator and denominator are equal

the degree of numerator is one higher than that of denominator

the degree of denominator is one higher than that of numerator

the difference between the degrees of numerator and denominator is 0 or 1

⇒

**Assertion (A):** Peak to peak value of a sinusoidal wave is 2.828 times the rms value.

**Reason (R):** Peak factor of a sinusoidal wave is 1.414.

Both A and R are true and R is correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

⇒ An input voltage V(

*t*) = 10 2 cos (

*t*+ 10°) + 10 3 cos (2

*t*+ 10°)

*V*is applied to a series combination of resistance R = 1 kΩ inductance L = 1H. The resulting steady-state current

*i*(

*t*) in ampere is

10 cos (

*t*+ 55°) + 10 cos (2

*t*+ 10° tan

^{-1}2)

10 cos (

*t*+ 55°) + 103/2 cos (2

*t*+ 55°)

10 cos (

*t*- 35) + 10 cos (2

*t*+ 10° - tan

^{-1}2)

10 cos (

*t*- 35) + 103/2 cos (2

*t*+ 35°)

⇒ A phasor is

a line representing the magnitude and direction of an alternating quantity

a line which represents the magnitude and phase of an alternating quantity

an instrument used for measuring phases of an unbalanced 3-phase load

a coloured tag or band for distinguishing between different phases of a 3-phase supply

⇒ 110.11

_{2}x 110

_{2}= __________

_{10}

40.5

30.5

20.5

10.5

⇒ If other parameter are constant, transmission loss at 5 GHz as compared to that at 0.5 GHz is

20 dB more

20 dB less

700 dB more

100 dB less

⇒ A step down cycloconverter has an input frequency

*f*. If it uses natural commutation, the output frequency

must be a sub-multiple of input frequency

can be any frequency

must be an even sub-multiple of input frequency

must be an odd sub-multiple of input frequency

⇒ The signal defined by the equations

*f*(

*t*) = 0 for

*t*< 0,

*f*(

*t*) = E for 0 ≤

*t*≤

*a*and

*f*(

*t*) = 0 for

*t*>

*a*is

a step function

a pulse function

a shifted step function originating at

*t*=

*a*

none of the above

⇒ In a varactor diode the increase in width of depletion layer results in

decrease in capacitance

increase in capacitance

no change in capacitance

either (a) or (b)

⇒ Precisely 1 K byte means

1000 bits

1012 bits

1020bits

1024 bits

⇒ As compared to BJT, MOSFET has

lower switching losses and higher conduction losses

higher switching losses and higher conduction losses

higher switching losses and lower conduction losses

lower switching losses and lower conduction losses

⇒ Which converter is used in HVDC transmission?

3 pulse

6 pulse

12 pulse

24 pulse

⇒ TV signal strength when expressed in dB m has the reference of

10 μV/m

5 μV/m

2 μV/m

1 μV/m

⇒

**Assertion (A):** A GTO circuit is more compact than SCR circuit

**Reason (R):** A GTO can be turned off by negative gate pulse.

Both A and R are correct and R is correct explanation of A

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ 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

⇒ In a minimum function

the degree of numerator and denominator are equal

the degree of numerator and denominator are unequal

the degree of numerator is one more than degree of denominator

the degree of numerator is one less than degree of denominator

⇒ Parallel wire transmission line is an example of

lumped network

distributed

depend upon I/P signal strength

power I/P

⇒ The slope of log magnitude asymptote changes by - 40 dB/ decade at a certain frequency and the error between asymptote and actual curve is - 6 dB. This means that

a double pole is present

a pair of complex conjugate poles is present

either a double pole or a pair of complex conjugate poles is present

either a pole or zero at that frequency is present

⇒

**Assertion (A):** TWT uses a focussing mechanism to prevent the electron beam from spreading.

**Reason (R):** In a TWT the electron beam has to travel a much longer distance than in klystron.

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 correct but R is wrong

A is wrong but R is correct

⇒ Most of the digital computers do not have floating-point hardware because

floating point hardware is costly

it is slower than software

it is not possible to perform floating point addition by hardware

of not specific reason

⇒ In order to rectify sinusoidal signals of millivolt range (< 0.6 V)

bridge rectifier using diodes can be employed

full wave diode rectifier can be used

a diode is to be inserted in the feedback loop of an op-amp

a diode is to be inserted in the I/P of an op-amp

⇒ In ionosphere incidence angle is 60°. The maximum usable frequency

*f*is equal to

_{m}2

*f*

_{c}*f*

_{c}0.5

*f*

_{c}3

*f*

_{c}⇒ In 8085 microprocessor, what is the length of status Word?

6 bits

8 bits

12 bits

16 bits

⇒ Which of the following is the indirect way of FM generation?

Reactance bipolar transistor modulator

Armstrong modulator

Varactor diode modulator

Reactance FM modulator

⇒ The upper and lower side frequencies for 3 kHz audio modulation with a 27 MHz carrier frequency will be

30 and 24 MHz

27.3 and 26.7 MHz

27.3 and 26.97 MHz

27.3 and 26.97 MHz