We built closed circuits using light ball and batteries and drew circuits diagram.
Electricity generates energy. We put a resistor in water and measure how the temperature changes with time. We can calculate the heat and energy generated by the resistor usingQ=mc*deltaT
This is a problem given resistor and voltage for calculating current.
Recall Physics4A, how to calculate the work to pull a cart to a certain height using three different paths?
Finally we find the work are all the same no matter what paths the cart takes.
Compare which of the three paths does the most work? Provided path A,B,C are same length.
We know V=kQ/r. If there are more than one point charges, Vtotal=V1+V2+V3+V4...Vn
For closed circuit, electrical potential total is always zero.
Draw equal potential lines surrounding a center of point charge.
Then, we solve a problem which applies the Vtotal=V1+V2. We solve how more than one point charges affect one reference point and calculate the electrical potential.
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