Download PHYS 222 Exam 1 Study Guide

PHYS 222 Exam 1 Study Guide
Concepts covered:
- Superposition: Electric and potential fields do not interact with one another, they only
interact with the particles.
- Rules for drawing and interpreting electric field diagrams: Lines cannot intersect,
correct directions of arrows, perpendicular to conductors, don’t interact with neutral
insulators, etc…
- Relationship between Electric field lines and equi-potential lines.
- Potential Energy vs. Potential: Potential energy exists between two particles, potential
is a measure of how much potential energy a particle would have if it were there.
- Work done by electric field is equal in magnitude and opposite in sign to the change in
potential energy of the particle in question.
- Potential everywhere inside a conductor is the same.
- Electric field everywhere inside a conductor is zero.
- Capacitors: Parallel plate, spherical, cylindrical, don’t need to memorize equations, but
you should understand how to setup the problems.
- Charge on one plate of a capacitor is equal to charge on the other.
- Equivalent capacitance
- The charge distribution on a capacitor plate is not necessarily uniform.
- Circuits: Emfs, resistors, resistance, parallel vs. series, Kirchoff’s Loop-rule, junctions,
etc…
- Understand how resistivity changes as the dimensions of the resistor change.
- Voltage difference across resistors in series is equal to the sum of the voltage
differences across each, while the voltage difference across each resistor which is in
parallel with each other is the same.
- Setting up equivalent resistors
- Power output of resistors and emfs
- Generating equations for a circuit using Kirchoff’s Loop rule and the junction rule