The metal mainly used in devising photoelectric cells is:

eSaral Updated on:
Question:

The metal mainly used in devising photoelectric cells is:

  1. $\mathrm{Na}$

  2. $\mathrm{Rb}$

  3. $\mathrm{Li}$

  4. $\mathrm{Cs}$

Correct Option: , 4

Solution:

Cs used in photoelectric cell as it has least ionisation energy.

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