Q.

Which of the following may be an incorrect statement regarding cathode ray discharge tube?

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a

Protons are present in cathode rays

b

It needs high voltage

c

The magnetic field deflects these rays

d

Presence of negative charge in cathode rays

answer is D.

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Detailed Solution

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Electric discharge in partially evacuated tubes in cathode ray discharge tube. Cathodes rays are made up of electrons. There is a presence of negative charge in cathode rays, magnetic field deflects these rays. Cathode ray discharge tube needs high voltage.

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