raLC Problem 17.40 What would be the magnitude of the electric force this combin

Question

raLC Problem 17.40 What would be the magnitude of the electric force this combination of charges would produce on a proton at A? Two point charges are separated by 25.0 cm (see the figure(Figure 1). Assume that q = 6.15 nC and 42 = 12.0 nC. DVD Azo sh a O Go ? 15 F= 2.4 • 10 - Figure 18 of 1 submit My Answers Give Up to IncorrectTry Again; 2 attempts remaining Part F -- ------- -------- ----- What would be the direction of the electric force this combination of charges would produce on a proton at AP 10.0 cm k 10.0 cm -25.0 cm The force would be directed to the right The force would be directed to the left. My Answers Give Up Correct

Explanation / Answer

here by using the formula

F = q * E

E = k*q / r^2

q1 and q2 are the same polarity so their fields subtract between them

E at A is then

E = E2 - E1

E = k*12*10^-9 / 0.1^2 - k*6.3*10^-9 / 0.15^2 = 10800 - 2520

E = 8280 N/C pointing left A)

then

the charge of proton = 1.6 * 10^-19 C

F = q * E

F = 1.6 * 10^-19 * 8280 = 1.3248 * 10^-15 N

so the magnitude of the electric force on A is 1.32 * 10^-15 N

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