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Physics

Physics
Sound waves cannot travel in

Water
Hydrogen gas
Glass
Vacuum

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Physics
Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly

Produce heat and radiate it toward earth
Reflect back the heat given by earth
Prevent cold waves from the sky descending on earth
Absorb heat from the atmosphere send it towards earth

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Physics
When a number of resistors are connected in series in a circuit, the value of current:

Increases
Decreases
Becomes half
Remains the same

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Physics
Radio activity is due to

Stable electronic configu-ration
Stable electronic configu-ration
Stable nucleus
Unstable nucleus

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Physics
Curie point is the temperature at which

Transmutation of metal occurs.
A metal loses conductivity
Matter becomes radioactive
A metal loses magnetic properties.

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Physics
For a ray of light to suffer total internal reflection it has to pass from :

Air to glass
Water to glass
Air to water
Glass to water

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MORE MCQ ON Physics

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