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| Q. |
For photoelectric effect to take place, the metal used as the cathode should have – |
| A. | high melting point |
| B. | low melting point |
| C. | low work function |
| D. | low resistance |
| Answer» C. low work function | |
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Explanation: The photoelectric effect is the propensity of high-energy electromagnetic radiation to eject electrons from a given material. The photoelectric effect has been utilized in devices called photocells, consisting of two electrodes in a sealed vacuum tube. |
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