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Physics

Physics
The instrument used to measure the speed of the wind is

Altimeter
Chronometer
Dosimeter
Anemometer

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Physics
The cover of a solar cooker is made of glass because

It absorbs sun's rays
It reflects sun's rays
It retains the heat inside by the green house effect
It rediates heat better than metals

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Physics
Why does'nt the hydrogen atom emit X-rays?

Its energy levels are very close to each other
It is highly electropositive
It has only one electron
It is very small in size

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Physics
The spring balance works on the principle of ________ .

Hooke's Law
Bernoulli's principle
Pascal's Law
Boyle's Law

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Physics
What is colour of light related to ?

Quality
Amplitude
Frequency
Velocity

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Physics
If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?

LUV > lVIS > lIR
LUV < lIR < lVIS
LUV > lIR > lVIS
LUV < lVIS < lIR

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