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Physics

Physics
The three famous law of Kepler is related to

Speed
Optics
Planetary Motion
Oscillations

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Physics
Bandwidth is the

The rate of data transfer
A measure of the width of a range of frequencies
None of these
Both a & b

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Physics
Suitable impurities are added to a semiconductor depending on its use. This is done in order to

increase its electrical conductivity
increase its life
enable it to withstand higher voltages
increase its electrical resistivity

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Physics
Metals are good conductors of electricity because:

The atoms are lightly packed.
They have high melting point.
They contain free electrons.
All of these

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Physics
Which among the following waves is used for communication by artificial satellites ?

Radio waves
M.
Micro waves
Frequency of 1016 series

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Physics
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?

2.0958333333333
0.21041666666667
0.12847222222222
1.0479166666667

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