In a DC motor with a commutator, how many times does (i) the current in the armature coil change its direction during one rotation of the coil, (ii) the current stop flowing in the armature coil during one rotation of the coil?

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Electric Motor and Its Working | PadhAiPro

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TextElectric Motor and Its Working

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CASE_STUDIESElectric Motor and Its Working

Arun built a DC electric motor using whatever scrap material he had. Since he did not have a split ring, he used a full ring in contact with the brushes. State what will be the effect of using a full ring on the movement of the axle in Arun's motor. Give a reason for your answer.

TextElectric Motor and Its Working

In the figure given below, a simple electric motor is shown : As shown in the figure, the current in the coil ABCD flows from A to B in the arm AB and C to D in the arm CD. (i) State the directions in which the arms AB and CD will experience a force. (ii) Identify the part of the electric motor that reverses the flow of current in the coil ABCD and write its name. (iii) After the reversal of flow of current in the coil ABCD, state the directions in which the arms AB and CD will experience a force. (iv) Name the rule which is applied to determine the direction of force on a current carrying conductor placed in a magnetic field.

TextForce on Current-Carrying Conductor in Magnetic FieldFleming's Left-Hand RuleElectric Motor and Its Working