6.01 Lecture Notes - Lecture 6: International System Of Units, Lorentz Force
22 May 2016
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Vector (magnitude, direction at very point in space) Direction of eld at any point is tangent to the eld line at that point. Magnitude of eld at any point is proportional to number of eld lines per unit perpendicular area at that point. A scalar eld has a single number assigned to each point in the eld. A vector eld has magnitude and direction assigned to each point in the eld. Two types of electric charge: positive and negative. Charge of an electron or proton: e = 1. 602 x 10 c where e is called the elementary charge. Charge os conserved: it cannot be created or destroyed. The electric force between charges q and q is repulsive if the charges have the same signs and attractive is the changes have different signs. Friction: objects become electrically changed by rubbing through adhesion as changes move from one object to another. Force on q due to interaction between q and q.
