# Ch. 8 Physical Science

 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 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. 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. False Power plants usually produce alternating current because voltage can be increased or decreased with transformers. Authorbogera ID59813 Card SetCh. 8 Physical Science DescriptionCh. 8 Physical Science Updated2011-01-18T02:05:31Z Show Answers