Two point charges lie on the x axis. A charge of +1.5
apply eelectric field E = Kq/r^2 or each charge
so
a. ENet at -2cm = E1+E2
Enet = ( 9e9 * 1.5 e-6/(0.02*0.02) +(9e9 * 6.6 e-6/(0.12*0.12)
Enet = 3.787*10^7 N/C
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b. ENet at 2cm = E1+E2
Enet = ( 9e9 * 1.5 e-6/(0.12*0.12) +(9e9 * 6.6 e-6/(0.02*0.02)
Enet = 1.49 *10^8 N/C
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