Byju's Answer

Standard IX

Chemistry

Cathode Ray Experiment

Assertion :Ca...

Question

Assertion :Cathode rays get deflected towards the positive plate of electric field. Reason: Cathode rays consist of negatively charged particles known as electrons.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
A cathode ray is a stream of electrons that are seen in vacuum tubes. It is called a "cathode ray" because the electrons are being emitted from the negative charged element in the vacuum tube called the cathode.

Deflection of Cathode Rays by an Electric Field - The application of high voltage to capacitor plates creates an electric field. When a cathode ray is passed through this electric field, the negatively charged electrons are deflected toward the positive charged plate and away from the negatively charged plate.

Therefore, option A is correct.

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(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
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