Electric charges of $+10\,\mu\, C, +5\,\mu\, C, -3\,\mu\, C$ and $+8\,\mu\, C$ are placed at the corners of a square of side$\sqrt 2\,m$ . The potential at the centre of the square is
Electric charges of $+10\,\mu\, C, +5\,\mu\, C, -3\,\mu\, C$ and $+8\,\mu\, C$ are placed at the corners of a square of side$\sqrt 2\,m$ . The potential at the centre of the square is
- A
$1.8\,V$
- B
$1.8 \times {10^6}\,V$
- C
$1.8 \times {10^5}\,V$
- D
$1.8 \times {10^4}\,V$
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- [JEE MAIN 2018]
Assertion: Electron move away from a region of higher potential to a region of lower potential.
Reason: An electron has a negative charge.
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Reason: An electron has a negative charge.
- [AIIMS 1999]
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Consider two conducting spheres of radii ${{\rm{R}}_1}$ and ${{\rm{R}}_2}$ with $\left( {{{\rm{R}}_1} > {{\rm{R}}_2}} \right)$. If the two are at the same potential, the larger sphere has more charge than the smaller sphere. State whether the charge density of the smaller sphere is more or less than that of the larger one.
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