Wednesday Homework Problem 3.7 The electric field in a region of space is given

Question

Wednesday Homework Problem 3.7 The electric field in a region of space is given by Note, this electric field can not be generated by a static charge, we're just playing with vector functions. Assume two significant figures. Compute the electric field at a point 5m along the positive z axis. Select One of the Following (a) (008,1008,-58) (b) (008, 508,-258) (c) (-2508,508,-258) (d) (-25008.508,-258) (e) (-258,508 258) Wednesday Homework Problem 3.8 An object with charge Q is placed in an electric field E (b, e, d where b, e, and d are constants. What is the electric force exerted on the object by the field? Select One of the Following (a) (b, c, d) (d) (Q/b, Q/c, Q/d) (e) (Qb, Qc, Qd)

Explanation / Answer

Problem 3.7) given that E(r) = (100N/C, 50N/C , -x^2)

Since we are asked to compute field at x = 5

x^2 = 5^2 = 25

-x^2 = -25

So E(r) = (100N/C,50N/C, -25 N/C)

Answer) option b)

Problem 3.8) since we know Force = change x electric field

F = q*E

Since given E = (b,c,d)

Force = (Qb,Qc,Qd)

Answer) option E)

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