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Question: Answered & Verified by Expert
The potential difference between two parallel plates is $10^4 \mathrm{~V}$. If the plates are separated by $0.5 \mathrm{~cm}$, the force on an electron between the plates is
PhysicsCapacitanceJEE Main
Options:
  • A $32 \times 10^{-13} \mathrm{~N}$
  • B $0.32 \times 10^{-13} \mathrm{~N}$
  • C $0.032 \times 10^{-13} \mathrm{~N}$
  • D $3.2 \times 10^{-13} \mathrm{~N}$
Solution:
2674 Upvotes Verified Answer
The correct answer is: $3.2 \times 10^{-13} \mathrm{~N}$
The force $F=\frac{e V}{d}$
$=\frac{1.6 \times 10^{-19} \times 10^4}{0.5 \times 10^{-2}}$
$=3.2 \times 10^{-13} \mathrm{~N}$

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