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Q1. | In the circuit of figure diode will con |

A. | from 90 to 180° in the positive half cycle [Wrong Answer] |

B. | from 30° to 180° in the positive half cycle [Wrong Answer] |

C. | from 50° to 160° in the positive half cycle [Wrong Answer] |

D. | from 30° to 150° in the positive half cycle [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 :**

⇒ The log magnitude plot of the given figure is

type 0 system

type 1 system

type 2 system

either type 0 or type 1 system

⇒ A function is given

*f*(

*t*) = sin

^{2}

*t*+ cos

^{2}

*t*. Which of the following is true?

f has frequency components at 0 and 1/2p Hz

f has frequency components at 0 and 1/p Hz

f has frequency components at 1/2p and 1/p Hz

f has frequency components at 0, l/2p and 1/p Hz

⇒ In sinusoidal PWM for inverters the width of different pulses are not the same.

TRUE

FALSE

⇒ The angular location of poles depends on

undamped natural frequency

damping ratio

both (a) and (b)

neither (a) nor (b)

⇒ The first and second subscripts in models of circular waveguides depict

the number of full sine wave variations in circumference in direction and Bessel function variations in radial direction respectively

the Bessel function variations in radial direction and the number of full sine wave variations in circumference direction respectively

the Bessel function variations in circumference direction and number of full sine wave variations in radial direction respectively

none of the above

⇒ A Darlington pair has β = 300. If R

_{E}= 1 kΩ and R

_{L}= 100 Ω, the input impedance at the base is approximately

300 k ohm

3 k ohm

100 k ohm

30 k ohm

⇒ In a colour TV receiver, PAL Dematrix consists of

chroma detector to separate the three primary colours

delay line and PAL matrix to give U and V signals

delay line and PAL matrix to give RGB colours

none of the above

⇒ So-called 'grounded' antennas are often found insulated from the ground electrically.

TRUE

FALSE

⇒

Match the following:

List I (Types of N-bit ADC) | List II (Characteristics) | ||
---|---|---|---|

A. | Flash converter | 1. | Integrating Type |

B. | Successive | 2. | Fastest converter approximation |

C. | Counter ramp | 3. | Maximum conversion time = N bits |

D. | Dual slow | 4. | Used a DAC in its feedback path |

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

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

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

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

⇒ In the analogy between electric and magnetic circuits permeability is analogous to

resistivity

conductivity

electric field intensity

current density

⇒ FORTRAN expression for 3

*b*

^{2}-5

*a*

^{2}is

SQRT (3 * B ** 2 - 5 * A ** 2)

SQRT 3 * B ** 2 - 5 * A ** 2

SQRT (3 * b ** 2 - 5 * a ** 2)

SQRT (3 * B ** 2) - SQRT (5 * A **2)

⇒ A dynamometer wattmeter is connected in ac circuit. The reading will be

V-A product

average power

peak power

instantaneous power

⇒ Time rate of change in heat energy is analogous to

voltage

charge

current

voltage gradient

⇒ In a biased limiter the clipping level can be adjusted by adjusting the voltage of battery.

TRUE

FALSE

⇒ In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will

be reduced by half

be doubled

be four times as high

be reduced to one fourth

⇒ What will be minimum conversion rate in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).

9000

9259

1000

1000

⇒ An ideal rectifier should have

100% efficiency, zero ripple factor, zero harmonic factor and unity displacement factor

100% efficiency, zero tipple factor, zero harmonic factor and zero displacement factor

100% efficiency, zero ripple factor, unity harmonic factor and unity displacement factor

100% efficiency, unity ripple factor, zero harmonic factor and unity displacement factor

⇒ The amplitude of a random signal uniformly distributed between - 5 V and 5 V. If the positive values of the signal are uniformly quantized with a step size of 0.05 V, and the negative values are uniformly quantized with a step size of 0.10 V, the resulting signal to quantization noise is approximately

46 dB

43.8 dB

42 dB

40 dB

⇒ In a BJT CE amplifier circuit the value of coupling capacitor should be such that

its reactance is small for the lowest frequency in the input and output

its reactance is high for the lowest frequency in the input and output

its reactance is zero for the lowest frequency in the input and output

its reactance is infinite for the lowest frequency in the input and output

⇒ Which of the following devices uses a slow wave structure?

Klystron two cavity amplifier

Klystron multicavity amplifier

Reflex klystron oscillator

TWT

⇒

**Assertion (A):** SUS is a PUT and avalanche diode connected between gate and cathode

**Reason (R):** SBS has two SUS inbuilt together and connected in anti-parallel

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

⇒ The number of select lines in

`ALU 1C 74181`

is2

4

8

16

⇒ Over which frequency range the effect of atmospheric noise is significant?

Over 35 MHz

Below 30 MHz

Between 30 MHz and 100 MHz

Between 100 MHz and 150 MHz

⇒ If poles lie in first quadrant, damping ratio is

1

more than 1

less than 1

zero

⇒ Which mode has the minimum cutoff frequency in rectangular wave guides?

TE

_{11}

TE

_{10}

TE

_{01}

TE

_{20}

⇒ Leakage current approximately doubles for every 10°C increase in the temperature of a transistor has I

_{CBO}= 400 nA at 25°C, then its leakage current at 80°C

10 μA

18 μA

20 μA

15 μA

⇒ A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.

TRUE

FALSE

⇒

**Assertion (A):** In Darlington pair, the overall β is product of individual β_{s}

**Reason (R):** The voltage gain of a base driven amplifier is equal to ac collector voltage divided by ac base voltage

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

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ An antenna operates effectively when its dimensions are

of the order of magnitude of wavelength to be transmitted

very small than the magnitude of wavelength to be transmitted

very large than the magnitude of wavelength to be transmitted

either (a) or (b)

⇒ The resolution of 4 bit counting ADC is 0.5 volt, for an Analog input of 6.6 volts. The digital output of ADC will be

1011

1101

1100

1110