Physics
The nature of fuse wire is

High resistance and high melting point.
Low resistance and low melting point.
High resistance and low melting point.
Low resistance and high melting point.

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Physics
Stars twinkle because

the refractive index of the different layers of the earth's atmosphere ch
None of these
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
Why does the sea appear blue in colour?

Refraction of the sun light
Reflection of the sun light from water surface
Interference of the sun light from water surface
Scattering of the sunlight by water molecules

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