MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
| 1. |
Ultraviolet radiations of \[6.2\,eV\] falls on an aluminium surface (work function \[4.2\ eV\]). The kinetic energy in joules of the fastest electron emitted is approximately |
| A. | \[3.2\times {{10}^{-21}}\] |
| B. | \[3.2\times {{10}^{-19}}\] |
| C. | \[3.2\times {{10}^{-17}}\] |
| D. | \[3.2\times {{10}^{-15}}\] |
| Answer» C. \[3.2\times {{10}^{-17}}\] | |