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COMEDK2015PhysicsElectrostatics

A particle A has charge +q and particle B has charge +4 q , each of them having the same mass m . When allowed to fall from rest through the same electrical potential difference, then the ratio of their speeds will become

Options

  1. A2: 1
  2. B1: 2
  3. C1: 4
  4. D4: 1

Correct answer

B. 1: 2

Step-by-step solution

Given, m₁=m₂=m aligned &q₁=q &q₂=4 q aligned We know that E= 1 2 m v²=q V v² q [For same value of potential difference V ] v q v₁ v₂ = q₁ q₂ = q 4 q = 1 2 v₁: v₂=1: 2

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