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Q.

Assume that an electric field E⇀=30x2j^  exists in space. Then the potential difference VA-V0 where V0 is the potential at the origin and VA the potential at x=2m is:

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a

-80J/C

b

80J/C

c

120J/C

d

-120J/C

answer is C.

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Detailed Solution

Potential difference between any two points in an electric filed is given by,

dV=-E→.dx→ ∫V0VAdV = -∫0030x2dx VA-V0=-10x302 = -80J/C 

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