McqMate
| Q. |
Sum of two periodic signals is a periodic signal when the ratio of their time periods is |
| A. | a rational number |
| B. | an irrational number |
| C. | a complex number |
| D. | an integer |
| Answer» A. a rational number | |
| Explanation: sum of two periodic signals is a periodic signal only when the ratio of their time periods is a rational number or it is the ratio of two integers. for e.g., t1/t2 = 5/7 → periodic; t1/t2 = 5 → aperiodic. | |
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