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The electric potential decreases uniform...

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

A

must be equal to 20 V/cm

B

may be equal to 20 V/cm

C

may be greater than 20 V/cm

D

may be less than 20 V/cm

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The correct Answer is:
A
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