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| Q. |
Speed-power characteristic for Ward Leonard speed control method |
| A. | will start from origin |
| B. | will start from some positive value on power axis |
| C. | will start from some positive value on speed axis |
| D. | depends on other parameters |
| Answer» A. will start from origin | |
| Explanation: speed power characteristic of dc motor is plotted when, ward leonard speed control method is employed. for speed equal to zero, which is less than base speed, we get constant torque but variable power operation. thus, power will start increasing from origin. | |
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