TMobile LTE 11:42 AM session masteringphysics.com Problem 23.26 Mastering Physic

Question

TMobile LTE 11:42 AM session masteringphysics.com Problem 23.26 Mastering Physics Two point charges, 34AC and -2.0uC .are placed 5.0cm apart on the z axis. Assume that the negative charge is at the origin, and the positive z axis is directed from the negative charge to the positive. Part A At what points along the z axis is the electric field zero Express your answer using two significant figures. If there is more than one answer, give your answers separated by commas. 3.2.11 cm Give Up Submit incorrect; Try Again, 3 attempts remaining Part B At what points along the z axis is the potential zero? Let 0 at oo. Express your answer using two significant figures. If there is more than one answer, give your answers separated by commas. 1.8 Give Up Submit incorrect; Try Again; 5 attempts remaining Continue 45%

Explanation / Answer

Here , let electric field is at -x cm

then , for zero electric field

k*2/x^2 = k*3.4/(x+5)^2

0.7x^2 - 10 x - 25 = 0

solving for x

x = 16.45 cm

the point on the x -axis is -16.45 cm

b)

For zero electric potential

k*2/x = k*3.4/(5 - x)

1.7x = 5 - x

x = 1.85 cm

the potential is zero at x =1.85 cm

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