Electrostatics Questions

RE-NEET 2024

A metal cube of side 5cm is charged with 6 $\mathrm{\mu <!--\; \mu \; -->}$C. The surface charge density on the cube is

× The correct answer is (d) $0.4\times {10}^{–3}C{m}^{–2}$
Surface Charge density $Surface\; charge\; density\mathrm{\sigma <!--\; \sigma \; -->}=\frac{Q}{S}$
Total surface area S=$6a^2$

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RE-NEET 2024

The value of electric potential at a distance of 9 cm from the point charge $4\times <!--\; \times \; -->{10}^{-<!--\; -\; -->7}$ C is
Given $\frac{1}{4\mathrm{\pi <!--\; \pi \; -->}{\mathrm{\epsilon <!--\; \epsilon \; -->}}_0}=9\times <!--\; \times \; -->{10}^{9}N{m}^2{C}^{-<!--\; -\; -->2}$

× The correct answer is (d) $V=\frac{kq}{r}$

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NEET 2024
A thin spherical shell is charged by some source. The potential difference between the two points C and P (in V) shown in the figure is: $(\text{Take}\frac{1}{4\mathrm{\pi <!--\; \pi \; -->}{\mathrm{\epsilon <!--\; \epsilon \; -->}}_0}=9\times <!--\; \times \; -->{10}^{9}SIunits)$
× The correct answer is (d)
For uniformly charged spherical shell $V=\frac{kq}{R}(\text{For}r\le <!--\; \le \; -->R)$
$\therefore <!--\; \therefore \; -->V_C=V_P$
$V_C-<!--\; -\; -->V_P=\text{Zero}$
NEET 2016
× The correct answer is Paris.

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