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Q1. | The depletion layer width of Junction |

A. | decreases with light doping [Wrong Answer] |

B. | is independent of applied voltage [Wrong Answer] |

C. | is increased under reverse bias [Correct Answer] |

D. | increases with heavy doping [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 two stage cascade amplifier, each stage has a gain of 10 dB and noise figure of 10 dB. The overall noise factor is

10

1.09

1

10.9

⇒ Which of the following noise does not occur in transistors?

Partition noise

Shot noise

Flicker noise

Resistance noise

⇒

**Assertion (A):** In a parallel circuit with three branches having R, L and C respectively and fed by a step current I, the current through inductance is always zero.

**Reason (R):** The time constant of R-L circuit is L/R.

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

⇒ When subjected to alternating stresses, an insulating material is characterised by complex dielectric constant ∈

^{'}

_{r}-

*j*∈

^{"}

_{r}. In such materials, the dielectric losses under alternating stress is proportional

∈

^{"}

_{r}

both ∈

^{'}

_{r}and ∈

^{"}

_{r}

∈

^{'}

_{r}

(∈

^{"}

_{r})

^{2}

⇒ If D is diagonal and F is focal length, lens angle θ is

θ = tan

^{-1}(D/F)

θ = 2 tan

^{-1}(D/F)

θ = tan

^{-1}(D/2F)

θ = 2 tan

^{-1}(D/2F)

⇒ Consider the draw backs

- Slope overload
- Serration noise
- Granular noise

1 and 2 only

2 and 3 only

1 and 3 only

1, 2, 3

⇒ In a RS flip-flop no change occurs during

prohibited mode

set mode

reset mode

disable mode

⇒ In a N-type semi-conductor, the concentration of minority carriers is mainly depends on

the number of acceptor atoms

the number of donor atoms

the extent of doping

the temperature of the material

⇒ Which of the following op-amp circuits has zero resistance in the feedback path?

Inverting amplifier

Summing amplifier

Source follower

Integrating amplifier

⇒ What are the minimum number of 2 to 1 multiplexers required to generate a 2 input AND gate a 2 input Ex-OR gate?

1 and 2

1 and 3

1 and 1

2 and 2

⇒ The circuit in the given figur

positive logic OR gate

negative logic OR gate

negative logic AND gate

positive logic AND gate

⇒ The '

*h*' parameters of the circuit shown in the figure are

*h*

_{ib}= 25 Ω,

*h*

_{fb}= 0.999 and

*h*

_{ob}= 10

^{-6}Ω The Voltage gai

0.99

1.98

2

4

⇒ Which of the following material has nearly zero temperature-coefficient of resistance?

Carbon

Porcelain

Copper

Manganin

⇒ The width of a radio beam from a 1 m diameter parabolic antenna at 10 GHz is about

100°

50°

5°

1°

⇒ For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)

is -90°

is +90°

depends on the damping factor

none of the above

⇒

Match the following:

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

A. | Horn antenna | 1. | High directivity |

B. | Parabolic antenna | 2. | Very high directivity |

C. | Lens antenna | 3. | Moderate directivity |

A-1, B-2, C-3

A-3, B-2, C-1

A-3, B-1, C-2

A-1, B-3, C-2

⇒ The resolution of a 4 bit counting ADC is 0.5 volts. For an analog input of 6.6 volts, the digital output of the ADC will be

1011

1101

1100

1110

⇒ For a = - 1, find the value of V

_{2∞0V1none of the above}

⇒ Discrete transistors T

_{1}and T

_{2}having maximum collector current rating of 0.75 amp are connected in parallel as shown in the figure, this combination is treated as a single transistor to carry a total current of 1 ampere, when biased with self bias circuit. When the circuit is switched on, T

_{1}draws 0.55 amps and T

_{2}draws 0.45 amps. If the supply is kept on continuously, ultimately it is very likely

Both T

_{1}, and T

_{2}get damaged

Both T

_{1}, and T

_{2}will be safe.

T

_{1}Will get damaged and T

_{2}will be safe

T

_{2}will get damaged and T

_{1}, will be safe.

⇒ A sample of N-type semiconductor has electron density of 6.25 x 10

^{18}/cm

^{3}at 300k. If the intrinsic concentration of carriers in this sample is 2.5 x 10

^{13}/cm

^{3}at this temperature the hole density works out to be

10

^{6}/cm

^{3}

10

^{8}/cm

^{3}

10

^{10}/cm

^{3}

10

^{l2}/cm

^{3}

⇒ The ratio of tangential component of electric field at the surface of a conductor and the linear current density resulting from this field is __________ impedance

characteristic

critical

surface

polarizing

⇒ A parametric amplifier uses

non linear resistance

non linear reactance

either (a) or (b)

neither (a) nor (b)

⇒ The essential condition for antenna array to be linear is that

individual antennas of the array must be of equal size

individual antennas of the array must be equally spaced along a straight line

any two individual antennas of the array must not be in the same direction

none of the above

⇒ Which of the following is not a valid real constant in C?

426

321

-621.231

201.2314

⇒ Orbital disturbances of a geosynchronous satellite are caused by the

moon

sun

earth

all of the above

⇒ In which of the following frequency bands are the standard AM radio broadcast stations?

MF

HF

VHF

UHF

⇒ In magnetic film memory, the memory element consits of

plated wires

superconductive material

nickel iron alloy

doped aluminium

⇒ The diffusion current is proportional to

applied electric field

concentration gradient of charge carrier

square of the electric field

cube of the applied electric field

⇒ The number of spectral component when two cosine waves are multiplied of different frequency

1

2

8

4

⇒ Computer ICs work reliably because

they are based on two state design

these are made from pure silicon

these are maintained at two temperatures

none of the above