The electric potential is $V = x^{2} - 2 x$ . What us the electric field strength at $x = 1 ?$

- 2

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z e r o

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2

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4

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Solution

The correct option is B $z e r o$
$\frac{d V}{d x} = 2 x - 2$
$= 2 \times 1 - 2 = 2 - 2 = 0$

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