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| Q. |
It is impossible to start a differential compounded dc motor. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: it is so because of the unstable speed and torque characteristics. at starting, armature current and series field current are high. since the series flux subtracts from shunt flux, series flux actually reverses the magnetic polarity. this motor will typically be still or turn slowly in wrong direction while burning up because of excessive current. | |
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