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Physics

Physics
Magnetic keepers are pieces of

Soft iron
Nickel
Steel
Cobalt

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Physics
A thin oil film on a water surface appears coloured because of

Diffraction
Polarization
Reflection
Interference

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Physics
A periscope works on the principle of

Total internal reflection
Refraction
Reflection
Diffraction

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Physics
Which of the following is a conductor of electricity ?

Pure water
Salt water
Benzene
Rubber

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Physics
A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

100 J
75 J
50 J
150 J

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Physics
The colour of sky appears blue due to

Reflection
Scattering of shorter wave lengths
Dispersion
Refraction

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MORE MCQ ON Physics

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