In a hot cathode ray tube, what is the effect on the beam of particles if a hotter filament is used?

Brighter image is obtained

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Dimmer image is obtained

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Black and white image is obtained

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Coloured image is obtained

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Solution

The correct option is A
Brighter image is obtained

We get brighter image if a hotter filament is used because increasing the temperature of the filament increases the rate of emission of electrons from the tungsten filament.

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