PHY2049_05-27-11 - 1 Phy2049 • Circuits have capacitors...

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Unformatted text preview: 5/27/2011 1 Phy2049 • Circuits have capacitors and resistors. • Capacitors in parallel in series • Resistors in parallel in Series • Kirchhof’s two rules: voltage around the loop and currents at a junction. • P = iV = i 2 R = v 2 /R 2 1 C C C eq + = 2 1 1 1 1 C C C eq + = 2 1 R R R eq + = 2 1 1 1 1 R R R eq + = A. 5 Ω B. 7 Ω C. 2 Ω D. 11 Ω E. NOT What is the equivalent resistance between points 1 and 2. You measure the current through the 4 Ω wire and find it to be 3A. What is the potential difference between points 1 and 2? A. 12 V B. 30V C. 15V D. 20V E. NOT Consider the circuit shown in the figure. We assume that the emf device is ideal and that the connecting wires have negligible resistance. A current flows through the c i Current in a single loop circuit ircuit in the clockwise direction. In a time interval a charge passes through the circuit. The battery is doing work . Using energy conservation we can set this amount of work equal to the rate at which heat is dt dq idt dW dq idt = = = E Ei i 2 generated on R....
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This note was uploaded on 12/05/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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PHY2049_05-27-11 - 1 Phy2049 • Circuits have capacitors...

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