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The electric potential decreases unifro...

The electric potential decreases unifromly from 120 V to 80 V as one moves on the x-axis from x=-1 cm to x=+1 cm. The electric field at the origin

A

must be equal to `20 Vcm^(-1)`

B

may be equal to `20 Vcm ^(-1)`

C

may be greater than or equal to `20 Vcm^(-1)`

D

may be less than `20Vcm^(-1)`

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