Q. What will happen if the back emf of a DC motor vanishes suddenly?

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Q. What will happen, with the increase in speed of a DC motor?

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Q. Which part will surely tell that given motor is DC motor and not an AC type?

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Q. In DC motor, which of the following part can sustain the maximum temperature rise?

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Q. Direction of rotation of motor is determined by ____________

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Q. The current drawn by the armature of DC motor is directly proportional to ________________

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Q. Which power is mentioned on a name plate of a motor?

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Q. An electric motor is having constant output power. So, motor will have a torque speed characteristic _______________________

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Q. Which of the following quantity will decrease if supply voltage is increased?

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Q. In which of the following case we will get maximum power?

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Q. Sometimes motor has to be de-rated.

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Q. The armature shaft of a DC motor must be able to withstand ______________

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Q. In DC machines the residual magnetism is present. The order of residual magnetism is ___________

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Q. Sparking is discouraged in a DC motor.

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Q. Which of the following motor is used where high starting torque and wide speed range control is required?

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Q. The armature voltage control of DC motor will provide ___________

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Q. As there is no back emf at the instant of starting a DC motor, in order to prevent a heavy armature current from flowing though the armature circuit ___________

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Q. What will happen to torque if back emf and speed of the DC motor is doubled?

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Q. At the instant of starting, when a DC motor is put on supply, it will behave like ______________

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Q. All others are advantages of DC motor over AC motor except _______________

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