Two point charges $$100$$ μC and $$5$$ μC are placed at points A and B respectively with AB $$=$$ $$40$$ cm. The work done by external force in displacing the charge $$5$$ μC from B to C, where BC $$=$$ $$30$$ cm, angle ABC $$=$$π$$2$$ and $$14$$πε$$0=9$$×$$109Nm2/C2$$ ,is

Question

Two point charges $$100$$ μC and $$5$$ μC are placed at points A and B respectively with AB $$=$$ $$40$$ cm. The work done by external force in displacing the charge $$5$$ μC from B to C, where BC $$=$$ $$30$$ cm, angle ABC $$=$$π$$2$$ and $$14$$πε$$0=9$$×$$109Nm2/C2$$ ,is

Infinity Learn · Accepted Answer

Work done in displacing charge of $$5$$ μC from B to C $$isW=5$$×$$10-6VC-VB$$ where $$VB=9$$×$$109$$×$$100$$×$$10-60.4=94$$×$$106$$ V  and $$VC=9$$×$$109$$×$$100$$×$$10-60.5=95$$×$$106$$ V  So $$W=5$$×$$10-6$$×$$95$$×$$106-94$$×$$106=-94$$ J

Two point charges 100 μC and 5 μC are placed at points A and B respectively with AB = 40 cm. The work done by external force in displacing the charge 5 μC from B to C, where BC = 30 cm, angle ABC $= \frac{π}{2}$ and $\frac{1}{4 {πε}_{0}} = 9 \times 10^{9} {Nm}^{2} / C^{2}, is$

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Two point charges 100 μC and 5 μC are placed at points A and B respectively with AB = 40 cm. The work done by external force in displacing the charge 5 μC from B to C, where BC = 30 cm, angle ABC =π2 and 14πε0=9×109Nm2/C2 ,is

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Two point charges 100 μC and 5 μC are placed at points A and B respectively with AB = 40 cm. The work done by external force in displacing the charge 5 μC from B to C, where BC = 30 cm, angle ABC $= \frac{π}{2}$ and $\frac{1}{4 {πε}_{0}} = 9 \times 10^{9} {Nm}^{2} / C^{2}, is$