Question 860: Electrostats & Capacitance

Question

An electric dipole consisting of two opposite charges of $$2 	imes 10^{-6} \mathrm{C}$$ separated by a distance of $$3 \mathrm{~cm}$$ placed in an electric field of $$2 	imes 10^5 \mathrm{~N} / \mathrm{C}$$ then the maximum torque acting on dipole is

Accepted Answer

$$\begin{aligned}
&\begin{aligned}
	ext { Dipole moment } \mathrm{p} & =\mathrm{q} 	imes 2 \mathrm{l}=2 	imes 10^{-6} 	imes 3 	imes 10^{-2} \
& =6 	imes 10^{-8} \mathrm{Cm}
\end{aligned}\
&\begin{aligned}
	herefore \quad 	au_{\max } & =ho E \sin 	heta=\mathrm{pE} \sin 90^{\circ} \
& =6 	imes 10^{-8} 	imes 2 	imes 10^5 	imes 1 \
& =12 	imes 10^{-3} \mathrm{Nm}
\end{aligned}
\end{aligned}$$

Answer

$$12 	imes 10^{-1} \mathrm{~N}-\mathrm{m}$$

Answer

$$24 	imes 10^{-3} \mathrm{~N}-\mathrm{m}$$

Answer

$$12 	imes 10^{-3} \mathrm{~N}-\mathrm{m}$$

Answer

$$24 	imes 10^{-1} \mathrm{~N}-\mathrm{m}$$

Electrostats & Capacitance

An electric dipole consisting of two opposite charges of $2 \times 10^{-6} \mathrm{C} separated by a distance of 3 \mathrm{~cm} placed in an electric field of 2 \times 10^5 \mathrm{~N} / \mathrm{C}$ then the maximum torque acting on dipole is

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