Physics II PH 112
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This 3 page Class Notes was uploaded by Jalon Willms on Monday October 19, 2015. The Class Notes belongs to PH 112 at Rose-Hulman Institute of Technology taught by Michael Moloney in Fall. Since its upload, it has received 11 views. For similar materials see /class/225110/ph-112-rose-hulman-institute-of-technology in Physics 2 at Rose-Hulman Institute of Technology.
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Date Created: 10/19/15
PH 112 Capacitance January 31 2005 MJM Name Box Capacitance is de ned as C qV A capacitor can be any two conductors where we may have equal and opposite charges q and a potential difference V between the conductors The unit of capacitance is the Farad named after Michael Faraday and IF lC V Two capacitors C1 anal C2 in series have an equivalent capacitance C is given by lC lC1 lC2 The each capacitor has the same charge q The potential difference V is the sum of the individual potential differences V V1 V2 Two capacitors in parallel have an equivalent capacitance C C1 C2 The charge q on the equivalent capacitor is shared between the two q q1 q2 The potential difference is the same on both capacitors and on the equivalent capacitor V V1 V2 In the diagram a 6volt battery provides a potential difference Vab 6v a Find the charge on each of the three capacitors b Find the potential difference across each LA 1 we u a 4 T6v b l w T 13 16 15 V3 V5 V5 PUT UNITS ON YOUR ANSWERS Over for one more problem Find the charge on each capacitor and the potential difference across each V2 V3 V4 V5 4HF PH 112 Capacitance January 27 2005 MJM Name Box Capacitance is de ned as C qV A capacitor can be any two conductors where we may have equal and opposite charges q and a potential difference V between the conductors When two capacitors C1 and C2 are attached in series the equivalent capacitance C is given by lC lC1 lCz C1 V1 fq C V The sketch at the right shows two capacitors in 1 series and their equivalent capacitance C C2 V2 Two features are very important 1 each capacitor has the same charge q 2 the potential difference V V1 V2 Use the relations V V1 V2 and qV1 C1 etc to show that 1C 1C1 1C2 For capacitors in parallel V1 V2 V and q q1 qz Use these relations to show C C1 C2 q1 l q2 C1 C C V1 V2 V Find the equivalent capacitance a in HF of the three capacitors shown in the sketch 3 HF q Cab 6 HP 4 J l T
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