# Unit 4 Electricity and Magnetism - Test Study Guide (1) ```Name __________________________________________ Date ________________________________ Physical Science Block _______
Unit 4: Electricity &amp; Magnetism Test Study Guide
Directions: Identify each of the following as a conductor or an insulator by writing an “I” or “C” in the blank.
____1. metal doorknob
_____ 6. rubber
____2. carpet
_____ 7. plastic
____3. silver
_____ 8. paper clip
____4. gold
_____ 9. copper
____5. wood
_____ 10. metal coat hanger
Directions: Describe how each of the following pairs of charges will react:
11. positive and positive
12. positive and negative
13. negative and negative
_____________________________
_______________________
MATCHING - Word Bank
circuit
series
attract
direct
electrons
alternating
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
______________________________
opposite
volts
circuit breaker
parallel
positively
fuse
negatively
current
Static
repel
like
A _______________ circuit has only one path for electricity to follow.
The flow of electrical charges from one point to another is called electric _______________.
A ____________ and a _____________ are safety devices that stop the flow of electric currents.
In both electricity and magnetism, ____________________ charges attract.
A _____________________ circuit has more than one path for electricity to follow.
An electron is _________________________ charged.
In both electricity and magnetism, _______________________ charges repel.
A single bolt of lightning carries 100 million ________________ of electricity.
__________________ electricity occurs when electrical charges build up on an object.
Static electricity occurs when items lose or gain ___________________.
A proton is ________________________ charged.
Two objects with equal numbers of electrons at their surface will _________ each other.
A(n) ________________ current circuit has current that flows in one direction (ex. batteries).
A(n) _________________ current circuit has current that flows changes direction -in the U.S. 60 times each second.
(ex. electric outlets)
28. Draw a parallel circuit that includes a battery, three light bulbs, and wire. Label the flow of electrons &amp; current.
29. Draw a series circuit that includes a battery, three light bulbs, and wire. Label the flow of electrons &amp; current.
30. What current flows through a 12 volt circuit in a car that has speakers with a resistance of 8 ohms?
31. What is the voltage in a circuit where a toaster that draws 1.2 Amp of current has 100 ohms of resistance?
32. How much resistance does an LED bulb in a 4.5 volt flashlight provide if it draws .05 amps of current?
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