Suppose you want to determine the electric field in a certain region of space. Y

Question

Suppose you want to determine the electric field in a certain region of space. You have a small object of known charge and an instrument that measures the magnitude and direction of the force exerted on the object by the electric field. (a) The object has a charge of +22.0 MuC and the instrument indicates that the electric force exerted on it is 43.0 MuN, due east. What are the magnitude and direction of the electric field? (b) What are the magnitude and direction of the electric field ?f the object has a charge of -11.0 MuC and the instrument indicates that the force is 30.0 MuN, due west? E =

Explanation / Answer

a)

As force on a charge due to field E is given as

F = qE

43 * 10^-6 = 22 * 10^-6 * E

E = 1.95 N/C

electric field is 1.95 N/C due east

b)

As force on a charge due to field E is given as

F = qE

30 * 10^-6 = -11 * 10^-6 * E

E = 2.72 N/C due east

electric field is 2.72 N/C due east

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