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    14.素養(4)
1 2焦耳的能量轉換成電子伏特為
A 1.25×1019eV
B 6.25×1018eV
C 3.2 ×10-19eV
D 3.2×1019eV

1eV = 1.6×10-19C × 1V = 1.6 ×10-19J

1J =1/1.6 ×10-19 = 6.25 ×1018 eV

2J = 6.25 ×1018×2 = 1.25 × 1019eV