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Ch. 8 Physical Science
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The properties and interactions of magnets
A. magetism
B. magnetic poles
C. magnetic field
magnetism
Area around a magnet that exerts a force on other magnes and objects made of magnetic materials
A. magetism
B. magnetic poles
C. magnetic field
magnetic field
Where the manetic force exerted by the magnet is strongerest
A. magetism
B. magnetic poles
C. magnetic field
magnetic poles
The groups of atoms with aligned magnetic poles are called
a. magetism
b. magnetic field
c. magnetic domains
magnetic domains
A temporary magnet made by wrapping a wire coil carrying a current around an iron core
A. electromagnet
B. solenoid
C. galvanometers
electromagnet
A single wire wrapped into a cylindrical wire coil
A. electromagnet
B. solenoid
C. galvanometers
solenoid
Devices that use an electromagnet to measure electric current
A. electromagnet
B. solenoid
C. galvanometers
galvanometers
Device that changes electric energy into magnetic energy
A. galvanometer
B. electric motor
C. generator
electric motor
The generation of a current by changing a magnetic field
A. electromagnetic induction
B. generator
C. turbine
electromagnetic induction
Uses electromagnetic induction to transform mechanical energy into electrical energy
A. galvanometer
B. electric motor
C. generator
generator
Provides electrical energy to operate lights and other accessories in a car
A. alternator
B. generator
C. turbine
alternator
A large wheel theat rotates when pushed by water, wind, or steam
A. alternator
B. generator
C. turbine
turbine
True or False
Both generators and elecric motors use
magnets to produce energy conversions between electrical and mechanical energy.
True
False
True
Current that flows only one direction through a wire.
A. alternating current (AC)
B. direct current (DC)
direct current (DC)
Reverses the direction of current in a regular pattern
A. alternating current (AC)
B. direct current (DC)
alternating current (AC)
The type of current you use when you plug your computer into the wall.
A. alternating current (AC)
B. direct current (DC)
alternating current (AC)
The type of current a battery produces
A. alternating current (AC)
B. direct current (DC)
direct current (DC)
A device that increases or decreases the voltage of an alternating current.
A. alternator
B. transformer
C. generator
transformer
True or False
A tranformer is made of just a primary coil.
True
False
False A transformer is made of a primary and a secondary coil.
The voltage in the primary coil is the
A. input voltage
B. output voltage
input voltage
The voltage in the secondary coil is the
A. input voltage
B. output voltage
output voltage
A transformer that increases the voltage so that the output voltage is greater than the input voltage is a
A. Step-up transformer
B. Step-down transformer
Step-up transformer
A transformer that decreases the voltage so that the output voltage is less than the input voltage is a
A. Step-up transformer
B. Step-down transformer
Step-down transformer
True or False
Power plants usually produce direct current because voltage can be increased or decreased with transformers.
True
False
False Power plants usually produce alternating current because voltage can be increased or decreased with transformers.
Author
bogera
ID
59813
Card Set
Ch. 8 Physical Science
Description
Ch. 8 Physical Science
Updated
2011-01-18T02:05:31Z
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