Two point charges lie on the x axis. A charge of 6.5 C is at the origin, and a c

Question

Two point charges lie on the x axis. A charge of 6.5 C is at the origin, and a charge of -9.5 C is at x=10.0cm.

Part A

What is the net electric field at x=4.0cm?

Express your answer using two significant figures.

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Part B

What is the net electric field at x=+4.0cm?

Express your answer using two significant figures.

Two point charges lie on the x axis. A charge of 6.5 C is at the origin, and a charge of -9.5 C is at x=10.0cm.

Part A

What is the net electric field at x=4.0cm?

Express your answer using two significant figures.

E  =   N/Cx^  

SubmitMy AnswersGive Up

Part B

What is the net electric field at x=+4.0cm?

Express your answer using two significant figures.

E  =   N/Cx^

Explanation / Answer

electeric field due to a charge point at adistance r = kq / r^2

A) electric field at x = -4cm = due to 6.5uC + due to -9.5uC

= - [ (9 x 10^9 x 6.5 x 10^-6) / (0.04^2) ] + [(9 x 10^9 x 9.5 x 10^-6)/(0.10+0.4)^2)]

= -36562500 + 4362244.90 = -32200255.10 N/C

B)

electric field at x = 4cm = due to 6.5uC + due to -9.5uC

= [ (9 x 10^9 x 6.5 x 10^-6) / (0.04^2) ] + [(9 x 10^9 x 9.5 x 10^-6)/(0.10-0.4)^2)]

= 60312500 N/C

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