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Questions  

The variation of potential with distance r from a fixed point is shown in Fig. 2.127. The electric field at r = 5 cm, is :

a
(2.5) V/cm
b
(-2.5) V/cm
c
(-2/5) V/cm
d
(2/5) V/cm

detailed solution

Correct option is A

E=-∆v∆r=--52Vcm=2.5 V/cm

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