U₁-36V R₁-2002 R₁ =180 r = 1 [2] (A₁) (a) Determine the current in and (A₂) (6) Cakulate the power of the battery (c) Calculate the power of R₁, and Rez (d) Calculate the efficency of the circle.

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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.