Ch. 8 part c Flashcards
Which unit measures power, or how fast work is done?
a. ampere
b. volt
c. joule
d. watt
d. watt
a coil of wire with a core attached to an electrical source is called a(n) ____.
a. battery
b. electromagnet
c. magnet
d. generator
b. electromagnet
A ____ is a material that can work as a conductor or as an insulator.
a. ROM
b. magnet
c. semiconductor
d. resistor
c. semiconductor
Who discovered that moving a magnet around or through a loop of wire produces electricity in the wire? (two answers)
a. Joseph Henry
b. William Sturgeon
C. Hans Christian Oersted
d. Michael Faraday
a. Joseph Henry
c. Hans Christian Oersted
who discovered that current traveling through a wire produces a weak magnetic field in the live wire?
a. Joseph Henry
b. William Sturgeon
C. Hans Christian Oersted
d. Michael Faraday
c. Hans Christian Oersted
Who discovered that adding a metal core to a coil of wire increased the magnetism?
a. Joseph Henry
b. William Sturgeon
C. Hans Christian Oersted
d. Michael Faraday
b. william sturgeon
Which one is correct? a or b
a. both magnets and static electricity require a power source to work
b. both magnets and static electricity can attract and repel objects.
b. both magnets and static electricity can attract and repel objects.
Which one is correct? a or b
a. the strength of an electromagnet can be affected by the size of the core of the number of coils around the core.
b. the strength of an electromagnet is determined only by the amount of electricity it receives.
a. the strength of an electromagnet can be affected by the size of the core of the number of coils around the core.
Which one is correct? a or b
A. A battery works as a result a chemical reaction and the movement of electrons.
b. A battery works as a result of electricity flowing through wires wrapped around a core.
A. A battery works as a result a chemical reaction and the movement of electrons.
Which one is correct? a or b
a. both electronic devices and electrical devices communicate information.
b. electronic devices can communication information, but electrical devices cannot.
b. electronic devices can communication information, but electrical devices cannot.
Describe one way magnetism produces electricity.
moving a magnet around or through a loop of wire produces electricity in the wire. Moving a wire between the north and south poles of two magnets also produces electricity in the wire.
