Two point charges are separated by 25.0 cm (see (Figure 1) ). Assume that q1 = -

Question

Two point charges are separated by 25.0 cm (see (Figure 1) ). Assume that q1 = -5.00 nC and q2 = -13.5 nC .Part A Find the net electric field these charges produce at point A. Part B Find the net electric field these charges produce at point B. Part C What would be the magnitude of the electric force this combination of charges would produce on a proton at A? Part D What would be the direction of the electric force this combination of charges would produce on a proton at A? The force would be directed to the right. The force would be directed to the left.

Explanation / Answer

A. Using the E=k*q/r2
E1=8.99x10^9*13.5x10^-9/0.1^2=12136.5
E2=8.99x10^9*5.0x10^-9/0.15^2=1997.78
E= 12136.5 -1997.78=10138.72 N/C ( To the Right)

B. E1=8.99x10^9*13.5x10^-9/0.35^2=990.73
E2=8.99x10^9*5.0x10^-9/0.1^2=4495
E= 4495 + 990.73 =5485.73 N/C ( To the Right)

C.  F=qE
F=(10138.72)*(1.6x10^-19) =1.62x10^-15 N ( To the Right)

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