1. Two negatively charged particles are located 2 meters apart. Each produces an electric force on the other of 3 Newtons (as determined by Coulomb’s Law). What force would they exert on each other if their distance decreased to 1 meter? (The strength of the charges, in Coulombs, stays the same.) 2. Two 50 Ω resistors are connected in series to a 300 V battery. What current flows through the circuit?

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.