Constants Correct A-4.00 nC point charge is at the origin, and a second -6.50 nC
ID: 1878319 • Letter: C
Question
Constants Correct A-4.00 nC point charge is at the origin, and a second -6.50 nC point charge is on the z-axis at z = 0.800 m. Significant Figures Feedback: Your answer 6.25.10-1 N was either rounded differently or used a different number of significant figures than required for this part. Part F Find the net electric force that the two charges would exert on an electron placed at point on the r-axis at -0.200 Express your answer with the appropriate units. Enter positive value if the force is in the positive z-direction and negative value if the force is in the negative z-direction. F-Value Submit Previous Answers Request Answer Incorrect, Try Again; 5 attempts remaining Provide Feedback Next >Explanation / Answer
-4 nC is at origin.
-6.5 nC is at x=0.8 m
opposite charges attract each other and charges of same sign repel each other.
as both the charges negative and electron is negatively charged, forces on the electron are repulsive in nature.
force on the electron due to -4 nC:
force is along -ve x axis
force magnitude=9*10^9*4*10^(-9)*1.6*10^(-19)/(0.2^2)
=1.44*10^(-16) N
force on the electron due to -6.5 nC:
force is along -ve x axis
force magnitude=9*10^9*6.5*10^(-9)*1.6*10^(-19)/(1^2)
=9.36*10^(-18) N
total force magnitude=force due to -4 nC + force due to -6.5 nC
=1.44*10^(-16)+9.36*10^(-18)
=1.5336*10^(-16) N
force is along -ve x axis.