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Current Electricity — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsCurrent Electricity1 Mark
MCQ
In hydrogen atom, the electron makes $6.6 \times 10^{15}$ revolutions per second around the nucleus in an orbit of radius $0.5 \times 10^{-10} \mathrm{~m}$. It is equivalent to a current nearly
  • A
    $1 \mathrm{~A}$
  • ✓
    $1 \mathrm{~mA}$
  • C
    $1 \mu \mathrm{A}$
  • D
    $1.6 \times 10^{-19} \mathrm{~A}$
✓

Answer

Correct option: B.
$1 \mathrm{~mA}$
(b) $i=q v=1.6 \times 10^{-19} \times 6.6 \times 10^{15}=10.56 \times 10^{-4} \mathrm{~A}=1 \mathrm{~mA}$

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