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12 cards from this deck
Increase and decrease potential difference
Primary coil and secondary coil
Iron core
Step-up transformer
Secondary has more turns than primary
Increase p.d. for electricity transportation via cables
Step-down transformer
Secondary has fewer turns than primary
Reduce p.d. before electricity reaches homes
Nearly 100% efficient
P=VIP = VIP=VI
V2×I2=V1×I1V_2 \times I_2 = V_1 \times I_1V2×I2=V1×I1
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