In free space, a particle A of charge 1…C is held fixed at a point P. Another particle B of the same charge and mass 4…g is kept at a distance of 1 mm from P. If B is released, then its velocity at a distance of 9 mm from P is : …

Option B. q_A = 1 …c ; q_B = 1 …c, m_B = 4 × 10^–9 kg, r_AB = 10^–3 m

Electrostatics

JEE Main 2019 · 10 Apr, Evening shift · Q7007

PhysicsMedium46×since 2002Q7007

In free space, a particle A of charge 1

\mu

C is held fixed at a point P. Another particle B of the same charge and mass 4

\mu

g is kept at a distance of 1 mm from P. If B is released, then its velocity at a distance of 9 mm from P is :

\left[ {Take\,{1 \over {4\pi { \in _0}}} = 9 \times {{10}^9}N{m^2}{C^{ - 2}}} \right]

JEE Main 2019 · 10 Apr, Evening shift · Q7007

PhysicsMedium46×since 2002Q7007

In free space, a particle A of charge 1

\mu

C is held fixed at a point P. Another particle B of the same charge and mass 4

\mu

g is kept at a distance of 1 mm from P. If B is released, then its velocity at a distance of 9 mm from P is :

\left[ {Take\,{1 \over {4\pi { \in _0}}} = 9 \times {{10}^9}N{m^2}{C^{ - 2}}} \right]