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Consider telecommunication through optic...

Consider telecommunication through optical fibers. Which of the following statements is not true ?

A

Optical fibres can be of graded refractive index

B

Optical fibres are subjected to electromagnetic interference from outside

C

Optical fibres have extremely low transmission loss

D

Optical fibres may have homogeneous core with a suitable cladding

Text Solution

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The correct Answer is:
B
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ALLEN-SEMICONDUCTORS-Part-3(Exercise-4)
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  9. In a common base amplifier the phase difference the input signal volta...

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  10. If a full wave rectifier circuit is operating from 50 Hz mains, the fu...

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  11. In a common-base of mode of transistor, the collector current is 5.488...

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  12. A solid which is not transperent to visible light and whose conductivi...

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  13. If the ratio of the concentration of electrons and that of holes in a ...

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  14. The circuit has two oppositely connected ideal diodes in parallel. Wha...

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  15. In the following, which one of the diodes is reverse biased ?

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  16. If the lattice constant of this semiconductor is decreased, then which...

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