In an uniform electric field $E = 10 N / C$ as shown in figure, find $V_{B} - V_{C}$ :

10 V

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- 10 V

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20 V

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- 20 V

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Solution

The correct option is D $20 V$
We know that $E l e c t r i c f i e l d,$ $d i s t a n c e$ and $V o l t a g e$ are related by formula,
$E . d = △ V$
Subsituting values,
$△ V = 10 \times 2 \times c o s 0^{o}$
$△ V = 20 V$

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