Recall: size of test charge doesn’t effect “E” Field lines:

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Presentation transcript:

Recall: size of test charge doesn’t effect “E” Field lines:

Recall: Charged particles in electric field Electric field lines are often called lines of force, and if we re-arrange the electric field equation we can see why. +Q -Q The force felt by the charge q is in the same direction of the electric field if q is positive and is opposite the electric field if q is negative.

To represent the strength of the electric field, the number of lines that enter or leave a charge are proportional to the magnitude of the charge. If Q1 is 1 μC and Q2 is -2μC then half as many field lines leave _______ as enter ________. Q2 Q1

Draw the field lines for the following situations: