Physics Electron, Photon, Photoelectric Effect and X-rays Cathode Rays and Positive Rays MCQ (Single Correct)

The mass of the electron varies with

A
The size of the cathode ray tube
B
The variation of ‘g’
C
Velocity
D
Size of the electron

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The correct answer is:
C

Mass is basically a constant term for any physical application at low velocity. But in accordance with Einstein's theory of relativity, at higher speeds the mass of the particle change according to formula

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