Question:
why test charge is always positive why not negative ? if source charge is posotive and test charge is also positive than there will be repulsion not attraction so there will be no electric field isnt it
Answer:
Test charge is always selected in a way that is it positive. This is done so that we are sure of the induced charge to be negative.
Not what you are looking for? Go ahead and submit the question, we will get back to you.
