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Physics

Physics
For which Diode is used ?

Purification
Oscillation
Amplification
Modulation

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Physics
Light from Sun reaches Earth in approximately

10 minutes
12 minutes
8 minutes
3 minutes

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Physics
The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:

8 T
2 T
1 T
4 T

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Physics
Why the needle of iron swims on water surface when it is kept gently ?

Due to surface tension
The density of needle is less than that of water
It will remain under the water, when it will displace more water than its weight
Due to its shape

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Physics
Waves that are required for long distance wireless communication are

Microwaves
Infrared rays
Ultraviolet rays
Radio waves

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Physics
Which of the following instrument is used to measure Soil Water Tension?

Psychrometer
Photometer
Tensiometer
Pyrometer

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MORE MCQ ON Physics

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