A +0.2 μC charge is at some point P in an electric field. Part A What happens if that charge is replaced by a +0.4 μC charge?

Explanation:

given,

Charge,q = +0.2 μC

using equation of electric field

r is the distance of the position where electric field is to be calculated.

k is coulomb constant

when q =  +0.2 μC

when charge is changed to q' = +0.4 μC

         distance is same r' = r

From, the above equation we can conclude that when the charge +0.2 μC is replaced by +0.4 μC the electric field of the system is doubled.

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