The total charge of how many electrons is equal to 1 coulomb?
(a) 1.6 × 10¹⁹
(b) 6.25 × 10¹⁰
(c) 6.25 × 10¹⁸
(d) 6.023 × 10²³
WBBSE
Class X
Physical Science
Current Electricity
01 Mark
2026
(c) 6.25 × 10¹⁸
Explanation
Charge of one electron = 1.6 × 10⁻¹⁹ C
Number of electrons corresponding to 1 C = \frac{1}{1.6 \times 10^{-19}}
= 6.25 × 10¹⁸
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