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NEET-XII-Physics

41: Electric Current through Gases

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  • #3
    How will the thermionic current vary if the filament current is increased?
    Ans : If the filament current is increased, it will increase the temperature of the cathode (metal) and the cathode will emit more electrons. This will lead to an increase in the number of thermions emitted per unit time. As a result, the thermionic current will increase.
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