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An electron moving freely through a potential difference of 1 kilovolt gains how

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1. An electron moving freely through a potential difference of 1 kilovolt gains how much energy?

1.6 × 10⁻¹⁹ joules

1.6 × 10⁻¹⁶ joules

1 × 10⁻¹⁹ joules

1 × 10⁻¹⁶ joules

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Energy gained equals charge times voltage: (1.6 × 10⁻¹⁹ C) × 1000 V = 1.6 × 10⁻¹⁶ J.

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