Download Study Guide for the test on Electricity and Magnetism. Name Atoms

Study Guide for the test on Electricity and Magnetism. Name __________________________________
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Atoms that gain electrons are __________________ charged and they are called ____________.
Atoms that lose electrons are __________________ charged and they are called ____________.
The law of charge particles interacting is ____________________________________________.
When two charged particles with like signs are brought near each other they _______________.
When two charged particles have opposite signs they are ___________________ to each other.
Three ways to transfer a charge are ______________, __________________, _______________.
Walking across a carpet or sliding out of a car is an example of charge being transferred by ____.
When a charge object touches another object the charge transfer is caused by _____________.
When a charged object is brought near a neutral object the transfer is called ______________.
The type of current in a car or a battery is ________________.
The type of current provided by the power company to homes and businesses is ____________.
Substances that allow electrons to flow easily are goo ________________.
Substances that restrict the flow of electrons are good ________________.
Three examples of conductors are ______________, ______________, _________________.
Three examples of insulators are ______________, ________________, _________________.
Ohm’s Law equation is _________________________________________, The symbols are , the
words are, the units are ______________________________________.
If a heat gun has a resistance of 16 ohms and a current that is measured at 20 amps, the voltage
through the dryer is ______________.
The voltage in a car is 12v, and the charger has 1 amp of current the resistance of the charger is
________________.
What is the current in a dishwasher which has 110 volts and 25 ohms of resistance? __________
The type of circuit allows electricity to flow through only one path is ____________________.
The type of circuit that is typically used in homes and businesses is _________________.
The type of circuit that allows electricity to flow in more than one path is _______________.
The equation for power in an electric circuit is _________________________, the unit for power is
the _______________.
The force field exerted by a magnet is the _______________ field.
The law of magnetic interaction is _________________________________________________.
Magnetic force can be increased by _____________________________________________ or by
_________________________________________________________________.
The earth’s magnetic poles are the areas where
______________________________________________________________________________.
The earth has _______________ magnetic poles.
When you break a bar magnet into pieces, each piece of the magnet ____________________.
A galvanometer is a device that __________________________________________________.
In order to increase the voltage of an electric motor you can _____________________________
______________________________________________________________________________.
Electric motors _________________________________________________________________
Generators ____________________________________________________________________.
Figure 20-2
34. Classifying Are both circuits in Figure 20-2 series circuits? Explain your answer.
Figure 20-3
35. Comparing and Contrasting Compare the resistance in the three circuits shown in Figure 20-3 when the
switches are closed. Explain the cause of any differences.
36. Comparing and Contrasting In Figure 20-3, how will the current compare in Circuits A, B, and C when the
switches are closed? Explain your answer.
37. Applying Concepts Explain why the filaments in the light bulbs become hotter than the connecting wires in
Figure 20-3.
38. Predicting When the switches are closed in Figure 20-3, which bulbs will be the brightest and which will be
the dimmest? Assume that all of the light bulbs and batteries are identical. Explain your answer.
39. Problem Solving Using the same materials, how could you change the circuits in Figure 20-3 so that all the
bulbs would have the same brightness? Explain your answer.