Science-Ch. 18-Part 3 Question Preview (ID: 31345)


Magnetism. TEACHERS: click here for quick copy question ID numbers.

changes voltage of an alternating current and contains 2 coils wrapped around an iron core
a) turban
b) transformer
c) turbine
d) reducer

electrical energy produced at power plants is carried to your home in wires
a) amperes
b) ohms
c) voltage
d) watts

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) turban
c) turbine
d) transformer

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) solar
b) kinetic
c) thermal
d) electrical

In power plants, _________________ produce almost all of the electrical energy in the world.
a) turbines
b) batteries and electric generators
c) batteries
d) electric generators

Direct current (DC) is where ______________ flow in one direction and is found in ______________________.
a) electrons, electric generators
b) neutrons. electric generators
c) electrons, batteries
d) protons, batteries

Alternating current (AC) is _________________________________ ,thus, changing its direction repeatedly, and is found in __________________________ .
a) positive to negative, electric generators
b) negative to positive, electirc generators
c) starting and stopping, batteries
d) stopping and starting, batteries

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

Coils of wire can produce a(n) __________________.
a) magnetic field
b) magnetic domain
c) magnetosphere
d) aurora

two metals inside Earth's core
a) iron and steel
b) iron and nickel
c) iron and aluminum
d) iron and copper

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