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Introduction

Cathode rays ...

Question

Cathode rays get deflected in an electric field towards :

A

positive plate

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B

negative plate

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C

no deflection takes place

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D

first towards negative plate and then towards positive plate

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Solution

The correct option is D positive plate
Cathode rays are deflected by the electric as well as magnetic field indicating that they are stream of minute particles catering negative charge.
When an electric field or magnetic field is applied over the discharge tube, the cathode rays gets deflected towards the positively charged plate

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