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Science-Ch. 18-Part 3
Test Description: Magnetism
Instructions: Answer all questions to get your test result.
1) Coils of wire can produce a(n) __________________.
A
magnetic domain
B
aurora
C
magnetosphere
D
magnetic field
2) In a generator, current is produced in the wire that moves in a magnetic field. The magnetic field exerts a force on the ______________.
A
neutrons
B
ions
C
electrons
D
protons
3) Alternating current (AC) is _________________________________ ,thus, changing its direction repeatedly, and is found in __________________________ .
A
stopping and starting, batteries
B
negative to positive, electirc generators
C
positive to negative, electric generators
D
starting and stopping, batteries
4) Direct current (DC) is where ______________ flow in one direction and is found in ______________________.
A
electrons, electric generators
B
protons, batteries
C
neutrons. electric generators
D
electrons, batteries
5) In power plants, _________________ produce almost all of the electrical energy in the world.
A
turbines
B
batteries
C
electric generators
D
batteries and electric generators
6) Different energy sources such as gas, coal, and water are used to provide the _____________ energy to rotate coils of wire in a magnetic field.
A
kinetic
B
thermal
C
solar
D
electrical
7) electrical energy produced at power plants is carried to your home in wires
A
voltage
B
amperes
C
watts
D
ohms
8) Electrical energy is leaving power plants at extremely high voltages (700,000 volts) which requires this device to reduce this high voltage:
A
reducer
B
turbine
C
turban
D
transformer
9) changes voltage of an alternating current and contains 2 coils wrapped around an iron core
A
reducer
B
turban
C
transformer
D
turbine
10) two metals inside Earth's core
A
iron and nickel
B
iron and aluminum
C
iron and copper
D
iron and steel
*select an answer for all questions
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