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Physics

Physics
Who among the following discovered X-rays?

J.J Thomson
W.C Roentgen
Marie Curie
James Chadwick

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Physics
A gradual increase in loudness is known as

Timbre
None of these
Crescendo
Fortissimo

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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:

2 T
4 T
1 T
8 T

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Physics
When a bar magnet is cut into two equal halves, the pole strength of each piece –

Becomes zero
Becomes double
Remains the same
Becomes half

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Physics
A colour-blind person cannot

See distant objects
Have persistence of vision
See black colour
Distinguish between certain colours

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Physics
Hertz is a unit for measuring

Wavelength
Clarity of waves
Frequency of waves
Intensity of waves

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