Physics
One Kilowatt hour is equal to -

3.6 Mega Joule
3.2 Mega Joule
4.0 Mega Joule
3.8 Mega Joule

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Physics
Stars twinkle because

None of these
the refractive index of the different layers of the earth's atmosphere ch
the distance of the stars from the earth changes with time.
the intensity of light emitted by them changes with time.

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Physics
Which of the following events occurred first ?

Madame Marie Curie became the first woman Nobel Prize winner
Marconi first tranmitted a wireless signal
Albert Einstein propounded the General Theory of Relativity
Max Planck unveiled the Quantum Theory

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