Calculate the kinetic energy of an electron accelerated through a potential difference of 100 V.

K.E. = eV = 1.6 × 10⁻¹⁹ × 100 = 1.6 × 10⁻¹⁷ J
K.E. = eV = 1.6 × 10⁻¹⁹ × 100 = 1.6 × 10⁻¹⁶ J
K.E. = eV = 1.6 × 10⁻¹⁹ × 100 = 1.6 × 10⁻¹⁸ J
K.E. = eV = 1.6 × 10⁻¹⁹ × 100 = 1.6 × 10⁻¹⁵ J

Correct answer: K.E. = eV = 1.6 × 10⁻¹⁹ × 100 = 1.6 × 10⁻¹⁷ J

Solution

The kinetic energy of a charged particle accelerated through a potential difference is given by K.E. = eV. Substituting e = 1.6 × 10⁻¹⁹ C and V = 100 V, we get K.E. = 1.6 × 10⁻¹⁷ J.

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