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1 變壓器滿載時(滿載溫度為90°C)一次側繞組電阻為3Ω,試求變壓器在25°C時一次側繞組電阻為多少Ω?
A 1.5Ω
B 2.4Ω
C
D 3.75Ω

R90° = R25°×234.5+90234.5+25

3 = R25°×324.5259.5

R25° = 2.4Ω