A test charge of -q at point P is used to measure an electricfield. The field is

Question

A test charge of -q at point P is used to measure an electricfield. The field is found to have a magnitude of 2N/C. Whenthe charge -q is removed, the electric field at point P: A) changes in a way that cannot be determined from theinformation given B )will have magnitude 2N/C C )will reverse in direction D) will change in magnitude A test charge of -q at point P is used to measure an electricfield. The field is found to have a magnitude of 2N/C. Whenthe charge -q is removed, the electric field at point P: A) changes in a way that cannot be determined from theinformation given B )will have magnitude 2N/C C )will reverse in direction D) will change in magnitude

Explanation / Answer

answer is B will have magnitude 2N/C. Since a test charge is a charge with a magnitude so small thatplacing it at a point has a negligible affect on the field aroundthe point. So after its removal, the field is still the same.

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