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Q.

In a region of space, O a uniform electric field E→=(3i^+4j^)Vm exists. If the potential at the origin is 10 V, what is the potential at the point A(2m,1m)?

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a

zero

b

2 V

c

4 V

d

- 2 V

answer is A.

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Detailed Solution

If O be the origin, then r→AO=r→A−r→O=(2i^+j^)mNow, VA−VO=−E→.r→AO⇒VA−10=−(3i^+4j^).(2i^+j^)V=−10⇒VA=0
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