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    In a step-up transformer, the voltage (p.d) is increased so therefore the current (voltage) becomes lower..... can anyone explain to me why?? Thank you!
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    (Original post by datters)
    In a step-up transformer, the voltage (p.d) is increased so therefore the current (voltage) becomes lower..... can anyone explain to me why?? Thank you!
    Energy conservation laws.

    Energy in = Energy out

    P = VI on both sides

    VpIp = VsIs

    If the secondary voltage is different to the primary, then the secondary current must change to preserve the energy conservation law.
 
 
 
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