Q154 / 160 · WBJEE 2009 · Physics

The number of electron in 2 coulomb of charge is

  • A
    $5 \times 10^{29}$
  • Correct answer
    B
    $12.5 \times 10^{18}$
  • C
    $1.6 \times 10^{19}$
  • D
    $9 \times 10^{11}$

Solution

$n=\frac{2}{1.6 \times 10^{-19}}=12.5 \times 10^{18}$

Hence, the correct answer is option: 'B'.

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