MCQOPTIONS
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MCQOPTIONS
| 1. |
The electric field intensity just sufficient to balance the earth?s gravitational attraction on an electron will be: (given mass and charge of an electron respectively are \[9.1\times {{10}^{-31}}kg\]and \[1.6\times {{10}^{-19}}C.\]) |
| A. | \[-\,5.6\times {{10}^{-11}}N/C\] |
| B. | \[-\,4.8\times {{10}^{-15}}N/C\] |
| C. | \[-\,1.6\times {{10}^{-19}}N/C\] |
| D. | \[-\,3.2\times {{10}^{-19}}N/C\] |
| Answer» B. \[-\,4.8\times {{10}^{-15}}N/C\] | |