1. [15 pts) Which ones of the following statements concerning electric force are true? [a] Electric force is originated

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1 15 Pts Which Ones Of The Following Statements Concerning Electric Force Are True A Electric Force Is Originated 1 (227.59 KiB) Viewed 33 times

1. [15 pts) Which ones of the following statements concerning electric force are true? [a] Electric force is originated from atomic charges. Amount of charges is a continued real number (i.e. g can be any positive or negative value). c] The direction of electric force follows "like charges attract" and "unlike charges repel" rules. [d] Electric force equals ma (i.e. mass times acceleration) le) If atomic electrons have no orbital motion, they will fly away due to electric force. It Two metal balls have equal but opposite charges. The net charge will be "zero" after they touch. 2. (20 pts] As shown in figure, a positive charge of -3.0 LC is located at point A while another positive charge of -3.0 C is located at point B. Their separation is 2 m. (a) What is the net electric field right in the middle between point A and B? (b) If a test charge of -2.0 uC is placed at this mid-point, what is the net force exerted on this test charge by the two charges at point A and B? (c) If the charge at point A changes to +3.0 uC, what is the net force direction on the test charge at this mid-point?