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Q1. | The phenomenon known as "Early effect" in a BJT refers to a reduction of the effective base width caused by |

A. | electron-hole recombination at the base [Wrong Answer] |

B. | reverse biasing of the base collector junction [Correct Answer] |

C. | forward biasing of emitter base junction [Wrong Answer] |

D. | the early removal of stored base charge during saturation to cut off switching [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 :**

⇒ Transformer coupling is mostly used in

RF amplifier

audio amplifier

both audio and RF amplifier

none of the above

⇒ A narrow band noise show

AM only

AM and FM

FM

PCM

⇒ Brownian motion is

random emission of electrons in vacuum tubes

thermal motion of electrons in a resistance

random diffusion of holes and electrons in semi- conductors

both (b) and (c)

⇒ Measurement of non-electrical quantity involves the following subsystems

- Amplifier block
- Display block
- Instrumentation block
- Transducer block

4, 1, 3, 2

4, 3, 1, 2

1, 3, 2, 4

1, 2, 3, 4

⇒ In a series inverter

the commutating elements carry full load current

the commutating elements carry upto 50% of load current

the commutating elements do not carry load current

any of the above

⇒ In a ripple counter,

whenever a flip flop sets to 1, the next higher FF toggles

whenever a flip flop sets to 0, the next higher FF remains unchanged

whenever a flip flop sets to 1, the next higher FF faces race condition

whenever a flip flop sets to 0, the next higher FF faces race condition

⇒

**Assertion (A):** When a function *f*(*t*) is represented as exponential Fourier series, the set of complex coefficients F* _{n}* is called frequency spectrum of

*f*(

*t*)

**Reason (R):** Frequency spectrum is also called line spectrum.

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 true, R is false

A is false, R is true

⇒ Decimal 17 in octal system is represented by

888

111

21

27

⇒ If a two port network is represented by an equivalent T network the admittance of series arm in term of ABCD parameter is equal to

C

1/C

(A - 1)/B

1/B

⇒ For a symmetrical network

*h*

_{11}=

*h*

_{22}

*h*

_{12}=

*h*

_{21}

*h*

_{11}

*h*

_{22}-

*h*

_{12}

*h*

_{21}= 0

*h*

_{11}

*h*

_{22}-

*h*

_{12}

*h*

_{21}= 1

⇒ In thermal ohm's law, temperature and power loss are analogous to

V and I respectively of ohm's law

I and V respectively of ohm's law

R and V respectively of ohm's law

I and R respectively of ohm's law

⇒ For resonant long wire antenna '

*n*' half wavelength long in free space, if '

*n*' is increased then inclination of the major lobe with wire axis will __________ .

increases

decreases

remains same

none

⇒ A relaxation oscillator uses

tunnel diode

UJT

both tunnel diode and UJT

PIN diode

⇒ At room temperature, a possible value for the mobility of electrons in the inversion layer of a silicon

*n*-channel MOSFET is

450 cm

^{2}/V-s

1350 cm

^{2}/V-s

1800 cm

^{2}/V-s

3600 cm

^{2}/V-s

⇒ In microstrip line has dielectric material most commonly used is

silicon

rubber

plastic

bakelite

⇒ Microprocessors find applications in

pocket calculators

scientific instruments

medical equipments

all of the above

⇒ If X = - 285.56 and the Pascal write statement used is

`WRITE (X : 8).`

Then the print out will appear as-285.56

-2.85 E + 02

-2.85560 E + 02

-2.8 E + 02

⇒ When a particular mode is excited in a waveguide, these appears an extra electric components in the direction of propagation. The resulting mode is

Transverse electric

Transverse magnetic

Longitudinal

Transverse Electromagnetic

⇒

**Assertion (A):** The number ∈ such that the probability that an error is between -∈ and + ∈ is 1 is called probable error of single obserevation.

**Reason (R):** The standard deviation is the arms value of the deviation from the arithmetic mean.

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 true, R is false

A is false, R is true

⇒ Atomic and molecular resonance is observed in many substances

at microwave frequencies

at low frequencies

at frequencies used in AM broadcast

at both (b) and (c)

⇒ Which of the following logic family is fastest of all?

TTL

RTL

DCTL

ECL

⇒ Two numbers are 131 ± 5 and 629 ± 3. The sum of the numbers with range of doubt is

760 ± 8

760 ± 2

760 + 8

760 - 8

⇒

**Assertion (A):** Heaviside partial expansion gives a simple procedure to find inverse Laplace transform of the terms having a complex conjugate pair of roots.

**Reason (R):** If I(*s*) = P(*s*)/Q(*s*) and all roots of Q(*s*) = 0 are simple, *i*(*t*) will have terms with exponentials having real exponents only.

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 true, R is false

A is false, R is true

⇒ When the length of antenna is a whole wavelength

the radiation at right angles is zero

the radiation at right angles is maximum

the radiation is zero in all directions

the radiation is maximum in all directions

⇒ In sign magnitude numbers,

the leading bit stands for the sign

the leading bit is part of the magnitude

the leading bit is always 0

the leading bit is always 1

⇒ Figure shows a portion of linear

*v*-

*i*characteristics of diode. If applied voltage is + 6 V, the current wil

42 mA

48 mA

51 mA

54 mA

⇒ A geostationary satellite is one which

hangs motionless in space about 36000 km about Earth

travels around the Earth in 24 hours

remains stationary above the Earth

appears stationary to everybody on Earth

⇒ Assuming that flip-flops are in reset condition initially, the count sequence observed at Q

_{A}in the circuit show

0010111...

0001011...

0101111...

0110100...

⇒ An AM wave is given by

*s*(

*t*)

_{AM}= 20 (1 + 0.5 cos 10

^{3}

*t*+ 0.3 cos 10

^{4}

*t*cos 10

^{6}

*t*) the modulation index of the envelope is

0.5

0.58

0.3

0.8

⇒ Which of the following configuration has low thermal stability?

CB

CC

CE

All have identical thermal stability