Two point charges are fixed on the -axis: at and at

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two point charges are fixed on the

x

-axis:

+4\,\mu\text{C}

x = 0\,\text{m}

and

-3\,\mu\text{C}

x = 0.30\,\text{m}

. Point

P

lies on the axis at

x = 0.20\,\text{m}

. (a) Find the magnitude and direction of the net electric field at

P

due to the two fixed charges. (b) Hence calculate the magnitude and direction of the force that would act on a

+2\,\mu\text{C}

test charge placed at

P