6.20 know and use the relationship: input power = output power

V_pI_p = V_sI_s

For 100% efficiency

V = Voltage

I = Current

p = primary

s = secondary

To find one value rearrange the equation (i.e. divide by something on both sides to leave a value on the other)

(V_pI_p) ÷ I_s  = V_s

Always use A for current, not kA 

Always use V for voltage, not kV