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ENTRANCE TEST – 2010 Multiple Questions and Answers.
| 6. | Life time of electron in metastable state is about _________ | ||
| A. | 10-5 sec | ||
| B. | 10-3 sec | ||
| C. | 10-8 sec | ||
| D. | 10-2 sec | ||
| 7. | The torque acting on a current carrying coil is given by ___________ | ||
| A. | τ = NIAB cos α | ||
| B. | τ = BIL sin α | ||
| C. | τ = NIAB sin α | ||
| D. | τ = NIAB sin α | ||
| 8. | The grid in the cathode ray oscilloscope _____________. | ||
| A. | Controls number of waves | ||
| B. | Controls the brightness of spot formed | ||
| C. | Accelerates electrons | ||
| D. | Has positive potential with respect to cathode | ||
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