SATHEE: electrostatic-potential-and-capacitance Question 10

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Question: Q. 2. Calculate the amount of work done to dissociate a system of three charges $1 μ C, 1 μ C$ and $- 4 μ C$ placed on the vertices of an equilateral triangle of side $10 cm$ .

A [O.D. Comptt. I 2013]

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Solution:

Ans. Given :

$\begin{aligned} q_{A} & = 1 \times 10^{- 6} C = q_{B} q_{C} & = - 4 \times 10^{- 6} C r & = 10 cm = 0.1 m \end{aligned}$

[CBSE Marking Scheme 2013]

AI Q. 3. Draw a plot showing the variation of (i) electric field $(E)$ and (ii) electric potential $(V)$ with distance $r$ due to a point charge $Q$ .

U[Delhi I, II, III 2012]

Ans.

Detailed Answer :

Due to point charge :

Electric potential, $V = \frac{1}{4 π ε_{0}} \cdot \frac{Q}{r}$

Now on plotting electric field and electric potential with distance $r$

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इलेक्ट्रोस्टैटिक क्षमता और धारिता

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