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प्रश्न
Which are the three main ways electrons can be emitted from a metal surface?
विकल्प
Photoelectric emission, positive ions, and potential difference
Thermionic emission, work function, and electrical conduction
Thermionic emission, field emission, and photoelectric emission
Electrical conduction, field emission, and electron volt
MCQ
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उत्तर
The three methods are thermionic emission, field emission, and photoelectric emission. They differ in how energy or an applied field enables electrons to leave the metal.
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