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Q1. | A thyristor circuit is feeding an R-L load. The turn on time can be reduced by |

A. | decreasing R [Wrong Answer] |

B. | decreasing L [Correct Answer] |

C. | increasing L [Wrong Answer] |

D. | decreasing R and L together [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 :**

⇒ A single phase full wave regulator feeds R-L load. The best gating signal is

short duration pulses

long duration pulses

pulse train

either (a) or (b)

⇒ For parallel RLC circuit, which one of the following statements is NOT correct?

The bandwidth of the circuit deceases if R is increased

The bandwidth of the circuit remains same if L is increased

At resonance, input impedance is a real quantity

At resonance, the magnitude of input impedance attains its minimum value

⇒ If D is mouth diameter of a paraboloid reflector, its directivity is proportional to

D

D

^{2}

D

D

^{3}

⇒ Least expensive logic

RTL

DTL

TTL

ECL

⇒ For a second order system, damping ratio ζ is such that 0 < ζ <. Then the roots of characteristic equation are

real but not equal

real and equal

complex conjugate

imaginary

⇒ Which one of the following blocks is not common in both AM and FM receivers?

RF amplifier

Mixer

IF amplifier

Slope detector

⇒ I =

*dq*/

*dt*.

TRUE

FALSE

⇒ "Micro-programming" is a technique

for programming the microprocessors

for writing small programs efficiently

for programming the control steps of a computer

for programming output/input

⇒ Class-B amplifier has less efficiency compared to

class A

class B

class C

class A, AB and C

⇒ The conductivity of a semiconductor crystal due to any current carrier is not proportional to

mobility of the carrier

effective density of states in the conduction band

electronic charge

surface states in the semiconductor

⇒ Ferrites are

hard materials

brittle materials

not easily machinable

materials with all above properties

⇒ A line has a phase constant of 29.8 rad/

*m*. At 1000 MHz the wavelength is

29.8 m

2.98 m

2.1 m

0.21 m

⇒ The derivative of unit step function is

unit impulse

ramp with slope 1

impulse

either (a) or (b)

⇒ The energy of constant amplitude complex valued exponential sequence is ...

A

^{2}

∞

1

0

⇒ If input frequency is 50 Hz, the frequency of output wave in a full wave diode rectifier circuit is

25 Hz

50 Hz

100 Hz

200 Hz

⇒ The effective length of an λ/2 antenna (Given R

_{r}= 73 Ω and (A

_{e})

_{max}= 0.13 λ

^{2}and η = 120 p is __________ .

0.6348 λ

0.317 λ

0.158 λ

0.371 λ

⇒ In a rectangular waveguide if operating frequency is greater than cut off frequency then propagation constant is

purely real

purely imaginary

equal to unit

a complex number

⇒ Open-circuit voltage is the potential difference between two point when the impedance between these points is

zero

infinity

capacitive

reactive

⇒ The disturbance from adjacent power lines is known as

cross talk

cross fire

inductive disturbance

none of the above

⇒ In figure, V

_{CC}= + 30 V, R

_{1}= 200 kΩ and R

_{2}= 100 kΩ. If V

_{BE}= 0.7 V, the voltage a cross R

_{E+20 V+19.3 V+10 V+9.3 V}

⇒ The difference between sequential and combinational circuits is

Combinational circuits store bits

Combinational circuits have memory

Sequential circuits store bits

Sequential circuits have memory

⇒ The circuit shown in figure

low pass filter

high pass filter

band pass filter

band stop filter

⇒ Commercial ECL gates use two ground lines and one negative supply to

reduce power consumption

increase fan out

reduce loading effect

eliminate the effect of power line glitches on the biasing circuit

⇒ Saturation region of a JFET is also known as

source region

analog region

pinch off region

ohmic region

⇒ A plot of modulation index vs carrier amplitude yields a

horizontal line

vertical line

parabola

hyperbola

⇒ A ramp input applied to a unity feedback system results in 5% steady state error. The type number and zero frequency gain of the system are respectively.

1 and 20

0 and 20

0 and 1/20

1 and 1/20

⇒ The common-drain amplifier, better known as the source follower, has a voltage gain __________ and the output signal is __________ with the input signal.

approaching unity, in phase

approaching unity, out of phase

is very high, in phase

is very high, in reverse phase

⇒ The AM, PM, and TV broadcast frequencies are

of the same order as microwave range

much lower than microwave range

much higher than microwave range

either (a) or (c)

⇒ The slope of log magnitude curve near the cut off frequency is called cut off rate.

TRUE

FALSE

⇒ Which of following is linear and bilateral parameter?

Resistors

Semi conductor diodes

Electron tubes

Transistor