electrostatic-potential-and-capacitance Question 10

Question: Q. 2. Calculate the amount of work done to dissociate a system of three charges 1μC,1μC and 4μC 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 :

qA=1×106C=qB qC=4×106C r=10 cm=0.1 m

[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=14πε0Qr

Now on plotting electric field and electric potential with distance r



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