establish the relation ip/is=Ns/Np
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electrical power input = electrical power output
Primary current x primary voltage = secondary current x secondary voltage
Ip x Vp = Is x Vs
ip/is = Vs/Vp=Ns/Np
In a STEP-UP transformer, the VOLTAGE is
INCREASED and the CURRENT is DECREASED.
In a STEP-DOWN transformer, the VOLTAGE is
DECREASED and the CURRENT is INCREASED.
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