Two particle of equal mass $m$ and charge $q$ are placed at a distance of $16\, cm$. They do not experience any force. The value of $\frac{q}{m}$ is
Two particle of equal mass $m$ and charge $q$ are placed at a distance of $16\, cm$. They do not experience any force. The value of $\frac{q}{m}$ is
- A
Zero
- B
$\sqrt {\frac{{\pi {\varepsilon _0}}}{G}} $
- C
$\sqrt {\frac{G}{{4\pi {\varepsilon _0}}}} $
- D
$\sqrt {4\pi {\varepsilon _0}G} $
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Two identical spheres each of radius $R$ are kept at center-to-center spacing $4R$ as shown in the figure. They are charged and the electrostatic force of interaction between them is first calculated assuming them point like charges at their centers and the force is also measured experimentally. The calculated and measured forces are denoted by $F_c$ and $F_m$ respectively.
($F_c$ and $F_m$ denote magnitude of force)
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($F_c$ and $F_m$ denote magnitude of force)
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