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) __________________.

2) In a generator, current is produced in the wire that moves in a magnetic field. The magnetic field exerts a force on the ______________.

3) Alternating current (AC) is _________________________________ ,thus, changing its direction repeatedly, and is found in __________________________ .

4) Direct current (DC) is where ______________ flow in one direction and is found in ______________________.

5) In power plants, _________________ produce almost all of the electrical energy in the world.

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.

7) electrical energy produced at power plants is carried to your home in wires

8) Electrical energy is leaving power plants at extremely high voltages (700,000 volts) which requires this device to reduce this high voltage:

9) changes voltage of an alternating current and contains 2 coils wrapped around an iron core

10) two metals inside Earth's core


*select an answer for all questions

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