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CBSE-XI-Physics

41: Electric Current through Gases

with Solutions -
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  • #4
    Would you prefer a material with a high melting point or a low melting point to be used as a cathode in a diode?
    Ans : We will prefer a material with high melting point to be used as the cathode in a diode. The material of the cathode of a diode should be resistant to high temperature, have high melting point and be electrically conductive because thermionic emission occurs at high temperature.
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