The figure below shows two charges. (a) Calculate the electric field at point P.

Question

The figure below shows two charges. (a) Calculate the electric field at point P. Q = 1.80 mu C, Q_2 = 1.30 mu C, d_1 = 1.50 m, d_2 = 1.60 m. (b) Calculate the force on a charge Q = +1.90 mu C placed at P due to the two charges from (a). A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has a total charge of -3q and the outer shell has a total charge of +1 q. Magnitude and direction. (a) What is the electric field for b

Explanation / Answer

1)

a) at point P

electric field at P = k * Q1/d1^2 + k * Q2/d2^2

electric field at P = 9 *10^9 * 10^-6 * (1.80/1.50^2 + 1.30/1.60^2)

electric field at P = 11770 N/C

the electric field at P is 11770 N/C

b)

force on the particle = electric field * charge

force on the particle = 11770 * 1.90 * 10^-6

force on the particle = 0.0223 N

the force on the particle is 0.0223 N

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