Contemporary Electronics Fundamentals, Devices, Circuits, and Systems 1st Edition by Louis Frenzel

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In Probs. 4.1 to 4.4, solve for the current, I , when V and R are known. As a visual aid, it may be helpful to insert the values of V and R into Fig. 4-8 when solving for I.
If a 100- resistor is connected across the terminals of a 12-V battery, how much is the current, I