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Question

An Electric field E=3^i5^j+^k exists in space. Find the potential difference between (1, 2, 1) and (4, 3, 5).


A
4 V
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B
18 V
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C
6 V
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D
8 V
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Solution

The correct option is D 8 V
Given:
E=3^i5^j+^k
Points (1, 2, 1) and (4, 3, 5)

We know that,
ΔV=E.[Δr]
So,
Δr=(4^i+3^j+5^k)(^i+2^j+^k)

Δr=(3^i+^j+4^k)

Now, ΔV=(3^i5^j+^k).(3^i+^j+4^k)

ΔV=(95+4)=8 V

Hence, option (D) is correct.

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