Which of the following statements is not true about canal rays?

They travel in straight line.

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They are made up of positively charged particles.

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Their e/m ratio is same for all gases.

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These rays produce fluorescence on

Z n S

screen.

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Solution

The correct option is C Their e/m ratio is same for all gases.
The e/m ratio of canal rays or positive rays depends on the mass of gas and is different for different gases.

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