

MCQOPTIONS
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1. |
An electron of mass m is kept in a vertical electric field of magnitude E. What must be the value of E so that the electron doesn’t fall due to gravity? |
A. | m*g*e |
B. | \(\frac {e}{(m*g)}\) |
C. | \(\frac {(m*g)}{e}\) |
D. | \(\frac {1}{(m*g*e)}\) |
Answer» D. | |