MCQOPTIONS
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| 1. |
Assertion (A): When cathode temperature is increased from 2500 K to 2550 K, thermionic emission current may increase by about 50%.Reason (R): Thermionic emission current ‚àù T2 e-Ew/kT. |
| A. | A is true but R is false |
| B. | A is false but R is true |
| Answer» B. A is false but R is true | |