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Factors That Influence Resistance

How can the r...

Question

How can the rate of emission of electrons in a cathode ray tube be increased ?

A

By increasing the filament current

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B

By decreasing the filament current

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C

Can't be increased

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D

None of the above

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Solution

The correct option is A By increasing the filament current
By increasing the filament current filament temperature increases, which transfer the heat to cathode. By this, the rate of electronic emission can be increased.

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