My Notes with wool, and acquires a charge of 3e-08 coulombs. We choose the cente

Question

My Notes with wool, and acquires a charge of 3e-08 coulombs. We choose the center of the rod to be the orligin of our coordinate system, with the x-axis extending to the right, the y-axis extending up, and the z-axis out of the page. In order t the rod into 8 pleces, and approximate each plece as a point charge located at the center of the piece. calculate the electric fleld at location A m, we divide j zero magnitude (a) What is the length of one of these pleces? -0.175 (b) What is the location of the center of plece number 5? | m. (c) How much charge is on piece number 5? (Remember that the charge is negative.) -7.58-09 x coulombs (d) Approximating piece S as a point charge, what is the electric fleld at location A due only to plece 5? N/C (e) To get the net electric field at location A, we would need to calculate E due each of the 8 pleces, and add up these contributions. If we did that, which arrow above would best represent the direction of the net electric fleld at location A?

Explanation / Answer

a)

Length of each piece = 1.4/8 = 0.175 m

b)

Location of center of piece 5 = -0.175/2 = -0.0875 m

c)

Charge on piece 5 = -3*10^-8/8 = -3.75*10^-9 C

d)

Electric field due to piece 5 = k*q/r^2

= 9*10^9*(3.75*10^-9)/(0.0875^2 + 0.7^2)

= 67.8 N/C

e)

option g is correct (as mentioned by you)

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