Question

Graphically represent the variation of electric field due to a point charge Q with (a) magnitude of charge Q (b) r and (c) 1/2² where 'r' is distance of the observation point from the charge.

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Answer 1

Answer:

We have to draw a plot for the variation of electric field (E) and electric potential (V) with distance r due to a point charge Q.

We know that electric field (E) for a point charge at a distance r is E=

4πε

0

1

r

2

Q

i.e, E varies with r as: E∝

r

2

1

Electric potential due to a point charge Q at a distance r is V=

4πε

0

1

r

Q

i.e, V∝

r

1

So,