Friday's quiz

Tomorrow's quiz will derive entirely from Ch. 16 in the textbook, or the equivalent sections in the notes.

UPDATE: I swear this one should be easier than the last one.

You will need: 1) the rules for combining series and parallel capacitors (formulas given),  and 2) the rule for calculating energy stored in a capacitor from voltage and capacitance (formulas also given).

One thing I haven't mentioned explicitly: if you put batteries together in series, and connect them plus-minus-plus-minus, you add the potential differences. So, two 3V batteries connected in series with the same polarity gives 6V. Charges moving through the batteries in series would get a boost of 3V potential difference from the first, and another boost of 3V from the second, and thus each charge acquires 6V potential after moving through the two batteries in series.

Two 3V batteries connected with opposite polarities (so plus-minus-minus-plus) usually leads to zero V, and undesirable behavior.