Electrical Machines
The direction of rotation of conductor of a DC motor can be determined by

 Fleming's left hand rule.
 Fleming's right hand rule.
 Lenz's law.
 Ampere law.

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Electrical Machines
For an ideal transformer the winding should have

 equal resistance on primary and secondary side
 minimum resistance on primary side and maximum resistance on secondary side
 maximum resistance on primary side and least resistance on secondary side
 no ohmic resistance on either side

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