EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET Medical 2018 (02 May Shift-1)>Q 8

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Two $p$ - $n$ photodiodes are fabricated from semiconductors with band gap of $2.8 eV$ and $2.6 eV,$ respectively.

Choose the correct statement from the following.

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Important Questions on Semiconductor Devices and Communication Systems

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET 2020 (28-Sep Shift-1)>Q 9

The universal gates are

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET 2020 (28-Sep Shift-1)>Q 10

What is the output of given logic circuit below if $A = 0, B = 1$ and $A = 1, B = 0$

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET Medical 2019 (8-May Shift-2)>Q 11

Identify the correct statement among the following.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET Medical 2021 (9-Aug Shift-1)>Q 12

In an amplitude modulation process, the modulation index is

μ .

The modulation index is changed to

μ_{1}

if the amplitude of modulation signal is increased by

1 % .

The modulation index is changed to

μ_{2}

if the amplitude of carrier signal is increased by

1 % .

Which of the following is true statement?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET 2020 (28-Sep Shift-1)>Q 13

A message signal

15 \sin (100 π t)

is used to modulate a carrier signal

45 \sin (3 \times 10^{6} π t) .

The modulation index is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET Medical 2018 (02 May Shift-1)>Q 14

If the maximum and minimum values of an amplitude modulated signals are respectively

5.9 V

and

1.2 V,

the modulation index of the signal is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET - 9 August 2021 Shift 2>Q 15

In frequency modulated wave.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Semiconductor Devices and Communication Systems>TS EAMCET - 10 August 2021 Shift 1>Q 16

Which of the following frequencies will be suitable for beyond the horizon communication using sky waves?