CAN YOU PLEASE SOLVE FOR BOTH. THANK YOU PH2200 University Physics ll Electricit

Question

CAN YOU PLEASE SOLVE FOR BOTH. THANK YOU

PH2200 University Physics ll Electricity & Magnetism Homework 5 Chapter 25 (18 points) Problem 25.38 Problem 25.38 A-10.5 nC point charge and a +21.0mC point charge are 13.0 cm apart on the ar-axis. session masteringphysic Resources previous l 8 of 15 l next a Part A What is the electric potential at the point on the z-axis where the electric field is zero? Express your answer with the appropriate units. 31.4 V V Subm My Answers Give Up incorrect: Try Again Part B What is the magnitude of the electric field at the point on the x-axis, between the charges, where the electric potential is zero? Express your answer with the appropriate units. E Value Units Submit My Answers Give Up Provide Feedback Continue

Explanation / Answer

r = distance of the dot from charge "q" = sqrt(42 + 32) = 5 cm = 0.05 m

electric potential at the Dot is given as

V = k (2nC)/(3 cm) + k (2nC)/(4 cm) + k (-q)/r

V = (9 x 109) (2 x 10-9)/0.03 + (9 x 109) (2 x 10-9)/0.04 + (9 x 109) (- 2 x 10-9)/0.05

V = 690 volts

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