PHYS227N S13 COOK Quiz 4

# PHYS227N S13 COOK Quiz 4 - Physics 227N/232N Quiz 4 5-7...

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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 rum 4.” A ‘ _ r 4551— ! __.§'L, \l I 5",” \‘LV 0.301! |Oop rant ow \tﬂ'i \o n, a a ‘ ._ ' 12'30 ‘ \ 1 )2+\Z.LI+L v,\ Noam a' 21% Q \$2 ‘ g -~-..(.‘J..|_+LZ—’L:OI " W ? \oop mm; on rth‘ "’ “£2 + \ZzCl‘i‘ TO ...
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