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Physics

Physics
One watt-hour is equivalent to

3.6 x 10-3 J
6.3 x 103 J
3.6 x 103 J
6.3 x 10-7 J

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Physics
Optical fibres are based on the phenomenon of

Total Internal Reflection
Diffraction
Interference
Dispersion

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Physics
Magnetism at the centre of a bar magnet is

minimum
minimum or maximum
maximum
zero

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Physics
The resistance of the human body (dry condition) is of the order of

103 Ohm
101 Ohm
102 Ohm
None of these

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Physics
The colour of sky appears blue due to

Dispersion
Reflection
Refraction
Scattering of shorter wave lengths

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Physics
Optical fibre works on which of the following principle of light?

Diffraction
Refraction
Reflection
Total internal reflection

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