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Unformatted text preview: Physics 227N/232N Quiz 4 - February 28, 2013 5-7. Name‘ - _ Group: __qO/— l I will uphold the Honor Code: \ql. Capacitance
If a piece of plastic is placed between the plates of a capacitor and the charge on the plates remains the m, the capacitance will
(a) Stay the same rease (c) decrease " 2. What is the equivalent capacitance of the system below? /WU 03. Resistance
You have 2mg of tungsten which you use to make a filament of length L and constant cross section. The resistance of the filament is measured to be R. You
now stretch the filament so that the length is 2L (with a new constant cross section resulting). What is the new v '_ : oithe resistanceln terms of R?
(a) R/4, (b) m. (c) R, Clei 4R 7-) / 4. In the circuit below, let n=3 and R=5 ohms. |f points A and B are connected to the
\5 terminals of a 12 Volt car battery. Calculate the equivalent resistance of the circuit
and also the current supplied by the battery. mm
B m Rm
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