# PHYS 1010 : notes for physics

212 views24 pages
20 Mar 2011
School
Course

## Document Summary

Activphysics can help with these problems: section 12, dc circuits . A literal reading of the circuit specifications results in connections like those in sketch (a). Because the connecting wires are assumed to have no resistance (a real wire is represented by a separate resistor), a topologically equivalent circuit diagram is shown in sketch (b). Problem: a circuit consists of two batteries, a resistor, and a capacitor, all in series. In a series circuit, the same current must flow through all elements. The order of elements and the polarity of the battery connections are not specified. Problem: resistors r1 and r2 are connected in series, and this series combination is in parallel with r3. This parallel combination is connected across a battery whose internal resistance is rint . The circuit has three parallel branches: one with r1 and r2 in series; one with just r3; and one with the battery (an ideal emf in series with the internal resistance).