Question

Would you prefer a material with a high work-function or a low work-function to be used as a cathode in a diode?

Answer 1

Answer:

I will prefer high-work function

Answer 2

A low amount of energy can be used to produce electron emission

Explanation:

• We'll choose to use a low work-function material as a cathode inside a diode, so that a low amount of energy can be used to produce electron emission.

Electron emission:- If an electron releases from a smooth metal surface, the cycle of electron emission is. Each atom has a nuclear component charged positively, and electrons charged negatively around it. Those electrons are also loosely coupled to the nucleus. A little move or tap thus sends these electrons or particles out of their orbits to fly.

To know more about work-function, visit:

If the work function of two metals X and Y are 4.17eV and 8.24× 10 to the power minus 19J respectively,then for which metal lesser amount of energy will be required to emit an electron?​

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A copper ball of radius 1 cm and work function 4.47 ev us irradiated with ultraviolet radiation of wavelength 2500a∘. the effect of irradiation results in the emission of electrons form the ball. further the ball will acquire charge and due to this there will be a finite value of the potential on the ball. the charge acquired by the ball is:?

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