Question 710: Electrostats & Capacitance

Question

At the centre of a half ring of radius $$\mathrm{R}=10 \mathrm{~cm}$$ and linear charge density $$4 \mathrm{~nC} \mathrm{~m}^{-1}$$, the potential is $$x \pi \mathrm{V}$$. The value of $$x$$ is _________.

Accepted Answer

$$\begin{aligned}
V & =\frac{K Q}{R} \
& =\frac{9 	imes 10^9 	imes 4 	imes 10^{-9} \pi R}{R} \
& =36 \pi
\end{aligned}$$

Electrostats & Capacitance

At the centre of a half ring of radius $\mathrm{R}=10 \mathrm{~cm} and linear charge density 4 \mathrm{~nC} \mathrm{~m}^{-1}, the potential is x \pi \mathrm{V}. The value of x$ is _________.

Choose the correct answer: