Electrical Machines
With the increase in speed of DC motor

 Back emf falls and line current increase.
 Both back emf as well as line current increase.
  Back emf increase but line current falls.
 Both back emf as well as line current fall.

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Electrical Machines
In a transformer

 OC test is conducted on HV side and SC test is conducted on LV side
 OC test is conducted on LV side and SC test is conducted on HV side
 both OC and SC tests are conducted on LV side
 both Oc and SC tests are conducted on HV side

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