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Q1. | Which junction has least junction capacitance? |

A. | Alloy [Wrong Answer] |

B. | Grown [Wrong Answer] |

C. | Diffused [Wrong Answer] |

D. | Point contact [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 :**

⇒ In figure, V

_{AB6 V10 V25 V40 V}

⇒ The input impedance of CRO is about

zero

10 Ω

100 Ω

one mega ohm

⇒

Match the following:

List I (Component) | List II (Dominant TE mode) | ||
---|---|---|---|

A. | Rectangular wave guide | 1. | TE_{101} |

B. | Circular waveguide | 2. | TE_{10} |

C. | Rectangular cavity | 3. | TE_{111} |

4. | TE_{11} |

A-4, B-2, C-1

A-2, B-1, C-3

A-3, B-4, C-1

A-2, B-3, C-1

⇒ Consider a system whose input

*x*and output

*y*are related by the equa

Causal, LP

BIBO, LTI

BIBO, Causal, LTI

LP, LTI

⇒ If the repeller voltage in a klystron oscillator is increased the transit time of electron

will be increased

will be decreased

will remain the same

either (a) or (b)

⇒ For parallel plane waveguides, which is the mode with lowest cut-off frequency?

TE

_{10}

TM

_{10}

TEM

TE

_{11}

⇒ Which of the following pulse-time modulation is least used?

PDM

PPM

PWM

PAM

⇒ The inductance of a twin feeder used to connect antenna to TV receiver is about

0.2 μ H/m

0.6 μ H/m

1.6 μ H/m

10 μ H/m

⇒ In calculating input impedance, the load impedance is considered to be connected at the output.

TRUE

FALSE

⇒ A constant

*k*low pass filter has

*f*

_{c}= 1000 Hz. At

*f*= 500 Hz, the phase shift is

p

zero

more than p

less than p

⇒ Pentavalent impurity creates

*n*type semiconductor.

TRUE

FALSE

⇒ Consider the z-transform X(

*z*) = 5

*z*

^{2}+ 4

*z*

^{-1}+ 3; 0 < |

*z*| < ∞ The inverse transform

*x*[

*n*] is

5δ[

*n*+ 2] + 3δ[

*n*] + 4δ[

*n*- 1]

5δ[

*n*- 2] + 3δ[

*n*] + 4δ[

*n*+ 1]

5

*u*[

*n*+ 2] + 3

*u*[

*n*] + 4

*u*[

*n*- 1]

5

*u*[

*n*- 2] + 3

*u*[

*n*] + 4

*u*[

*n*+ 1]

⇒ A DIAC has two terminals, anode and cathode.

TRUE

FALSE

⇒ Conversion rate, for a successive approximation ADC which uses 2 MH

*z*clock and 5 bit binary ladder containing 8 VV reference voltage is __________ .

64516.12

*conversions/sec*

400000

*conversions/sec*

400000

*bps*

2.5

*bps*

⇒ A linear time-invariant, causal continuous time system has a rational transfer function with simple poles at

*s*= - 2 and

*s*= - 4, and one simple zero at

*s*= - 1. A unit step

*u*(

*t*) is applied at the input of the system. At steady state, the output has constant value of 1. The impulse response of this system is

[exp (- 2

*t*) + exp (-4

*t*)]

*u*(

*t*)

[-4 exp (- 2

*t*) + 12 exp (-4

*t*) - exp (-

*t*)]

*u*(

*t*)

[-4 exp (- 2

*t*) + 12 exp (-4

*t*)]

*u*(

*t*)

[-0.5 exp (- 2

*t*) + 1.5 exp (-4

*t*)]

*u*(

*t*)

⇒

Match the following:

List I (Logic family) | List II (Characteristic of logic family) | ||
---|---|---|---|

A. | TTL | 1. | Maximum power Consumption |

B. | ECL | 2. | Highest Packing Density |

C. | NMOS | 3. | Least Power Consumption |

D. | CMOS | 4. | Saturated Logic |

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

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

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

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

⇒ The device most likely to be found in an SSB transmitter is

class C audio amplifier

tuned modulator

class B RF amplifier

class A RF amplifier

⇒ A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance

increases

decreases

remains constant

may increases or decreases

⇒ Consider the following statements about mutual inductances:

- The value should remain constant under all conditions.
- The mutual inductance should not vary with temperature.
- The inductance should be independent of excitation.
- They have two coils wound on a bobbin of hard magnetic material, coils being separated by a range.

2, 3, 4

1, 2, 3

1, 3, 4

1, 2, 4

⇒ In active filter circuits, inductances are avoided mainly because they

are always associated with some resistance

are bulky and unsuitable for miniaturisation

are non-linear in nature

saturate quickly

⇒ If

*x*

*is one sided to the ri*

^{k}TRUE

FALSE

⇒ How many free electrons does a

*p*type semiconductor has?

only those produced by thermal energy

only those produced by doping

those produced by doping as well as thermal energy

any of the above

⇒

**Assertion (A):** A half cycle of sine wave can be expressed as sum of sine wave and another sine wave shifted by *T*/2 where T is the time period.

**Reason (R):** The function *u*(*t* - *t*_{0}) - *u*(*t* - *t*_{0} - T) is a gate function occuring at *t* = *t*_{0} and of duration T.

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

⇒ For a transistor the normal collector voltage is 12 V. If actually it is found to be + 28 V, the trouble could be

R

_{L}is open

R

_{E}is open

C

_{E}is shorted

C

_{E}is open

⇒ Which of the following is not used as a microwave mixer or detector?

PIN diode

Crystal diode

Schottky barrier diode

Backward diode

⇒ The O/P Power of a power amplifier is several times its input power. It is possible because

power amplifier introduces a -ve resistance

there is +ve feed back in the circuit

step up transformer is use in the circuit

power amplifier converts a part of I/P d.c. power into a.c. power

⇒ High speed logic circuits use

pulses with very small width

pulses with very large width

pulses whose width is neither small nor large

either (b) or (c)

⇒

**Assertion (A):** In hybrid digital circuits the problem of logic race can occur.

**Reason (R):** In two level logic there is no problem of logic race.

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

⇒ For an n-channel enhancement type MOSFET, if the source is connected at a higher potential than that of the bulk (V

_{SB}> 0), the threshold voltage V

_{T}of the MOSFET will

remain unchanged

decrease

change Polarity

increase

⇒ The length of character constant P . b b . E . b C . is

9

6

10

7