Chapter 8: Electricity and Magnetism

Describe the force between two charges which is the source of all electric phenomena.

What do you mean by a conductor? and insulator? What types of materials are conductors?

What causes and electric current (amperes) to flow in a wire?

What are the parallels between water flow in a pipe circuit and electric current flow in a DC electric circuit?

What is Ohm's law?

How do you calculate electric current and power in an electric circuit?

How is it that a bird can sit on a high voltage transmission line and not be shocked?

How can you measure electric resistance with a voltmeter and ammeter?

Describe the basic layout of standard U.S. household wiring systems. Why are there two high voltage or "hot" wires?

Why are standard U.S. receptacles "polarized" with one wide prong and one narrow prong?

What is the function of a fuse or circuit breaker?

What is the function of a ground wire?

If the ground wire is broken, what indication of this will you get from the operation of the appliance?

Is household wiring in series or parallel? Why?

What is meant by a "short circuit"? an "open circuit"?

What kind of force does a magnetic field exert on a charge? on a current in a wire? on charges in a wire when the wire is moved through the magnetic field?

***Other information you might find to be of interest, but not on the main agenda for this course.***

How does a Van de Graaff generator achieve such high voltages?

Why is it dangerous to stand under a tree during a thunderstorm? Why is the lightning more likely to strike the tree than flat earth?

Why does the question "How much voltage does it take to be a shock hazard?" not have a straightforward answer? What is the best measure of the severity of a shock?

Why is it that a small amount of corrosion on an auto battery terminal can prevent the engine from starting?

If the auto won't start and you suspect the battery, are the headlights and horn operation a good test of the battery's strength?

Why is it that a battery may test at normal voltage even when it is too spent to supply appreciable power to a circuit?

What is the nature of the sources of magnetic fields?

How can a moving magnet generate a voltage in a coil of wire?

How can a magnetic field generate a voltage in a moving wire?

What kind of force does a magnetic field exert on a charge? on a current in a wire? on charges in a wire when the wire is moved through the magnetic field?

How is electric voltage generated in an electric generator?

How is the force which turns an electric motor produced?

What useful tasks can be accomplished by a transformer? What are the limitations on the power output of a transformer?

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*Coulomb's law

*Electric force example

*Conductors and insulators

*Current in wire

*Voltage

*Current

*Resistance

*Water circuit analogy

*Ohm's law

*Power relationship

*Voltage law

*Current law

*Bird on high voltage wire

*Voltmeter-Ammeter measurements

*Household wiring

*Polarized plugs

*Breakers and fuses

*Ground wire

*Series circuit

*Parallel circuit

*Magnetic force

*Magnetic field

*Transformer

*Van de Graaff generator

*Lightning

*Electric shock

*Auto battery example

*Voltmeter

*Ammeter

*Magnetic field of the Earth

*Bar Magnet

*Electromagnet

*Magnetic Field of a Current

*Magnetic field of Current Loop

*Solenoid

*Magnet and Coil

*Motional Voltage

*Generator