MCQOPTIONS
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MCQOPTIONS
| 1. |
A beam of electrons is moving with constant velocity in a region having simultaneous perpendicular electric and magnetic fields of strength \[20\,V{{m}^{-1}}\] and 0.5 T respectively at right angles to the direction of motion of the electrons. Then the velocity of electrons must be |
| A. | \[8\,m/s\] |
| B. | \[20\,m/s\] |
| C. | \[40\,m/s\] |
| D. | \[\frac{1}{40}\,m/s\] |
| Answer» D. \[\frac{1}{40}\,m/s\] | |