Transformers (HSC SSCE Physics): Flashcards

Convert AC voltages using electromagnetic induction

Changing magnetic field required; DC field is constant

Equivalent DC voltage/current delivering same power

V_{ ext{rms}} = rac{V_{ ext{peak}}}{sqrt{2}}

230V RMS at 50 Hz

$\frac{V_S}{V_P} = \frac{N_S}{N_P}$

$N_S > N_P$ (more secondary turns)

Increases current ($I_S > I_P$)

Lower current reduces loss ($P_{\text{loss}} = I^2R$)

Reduces eddy currents in transformer