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(e) State two ways to increase the speed rotation of a D.C. motor.(i) By increasing the strength of current through the coil.(ii) By increasing the number of turns in the coil. |
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Answer» Answer: Magnetic flux - By decreasing the flux, the speed of the motor can be increased. The flux can be CHANGED by changing the current with a shunt field rheostat. Resistance of the ARMATURE CIRCUIT - By decreasing the resistance, there is INCREASE in the armature current which causes a LARGER torque to be developed |
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