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Assertion : A diode lasers are used as o...

Assertion : A diode lasers are used as optical sources in optical communication.
Reason : Diode lasers consume less energy

A

Statetment-I is True, Statement-II is True , Statement-II is a correct explanation for Statement-I

B

Statement-I is True, Statement-II is True , Statement-II is NOT a correct explanation for Statement-I

C

Statement-I is True, Statement-II is False

D

Statement-I is False, Statement-II is True

Text Solution

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The correct Answer is:
B
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ALLEN-SEMICONDUCTORS-Part-3(Exercise-3)
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  2. A: Microwave propagation is better than the skywave propagation. R: ...

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  3. A: Semiconductors do not obey Ohm's law. R: In semiconductors the ra...

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  4. Statement-I : Germanium is preferred over silicon for making semicondu...

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  5. Assertion : p-n junction diode can be used even at ultra high frequenc...

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  6. Assertion : A p-n junction with reverse bias can be used photo-diode t...

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  7. A: NAND or NOR gates are called digital building blocks R: The repea...

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  8. Assertion : Two p-n junction diodes placed back to back, will work as ...

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  9. Assertion: When base region has large width, the collector current inc...

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  10. Statement-I : For faster action, n-p-n transistor is used Statement-...

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  11. Assertion:- To be used as amplifier, the transistor in the common emit...

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  12. Statement-I : Many channels get allowed when transmission frequency is...

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  13. Statement-I : Optical fibres are free from electromagnetic disturbance...

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  14. Assertion : A diode lasers are used as optical sources in optical comm...

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  15. Statement-I : Electromagnetic waves with frequencies smaller than the ...

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  16. Assertion : In optical fibre, the diameter of the core is kept small. ...

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  17. Statement-I : For the same antenna length, power radiated by short wav...

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  18. Statemet-1: the electrical conductivity of earth's atmosphere increase...

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  19. A: Optical communication system is more economical than other system o...

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  20. Statement-I : A communication satellite is essentially a repeater in s...

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