Magnets Question Preview (ID: 36891)


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The Earth's Magnetic Field is ___________
a) Very Strong
b) Very Big, but weak
c) Very small, but strong
d) very small and weak

An electromagnet ___________________.
a) can be turned off and on
b) can be produced without electricity
c) is not as strong as the Earth's magnetic field
d) all of the above

North and north will ____________
a) repel
b) attract
c) none of the above
d) both repel and attract

Which of the following describes the domains of something magnetic?
a) the domains are all pointing different directions
b) the domains are lined up (pointing the same direction)
c) the domains are very large and rotate in circles
d) none of the above

Which of the following will not increase the strength of an electromagnet?
a) adding more coils of wire around the nail
b) using a nail with a larger diameter
c) using a longer nail
d) using a larger (more powerful) battery

Which of the following does not describe the magnetic field of Earth?
a) It is symmetrical.
b) It can be reversed.
c) It protects the Earth from radiation.
d) It is very strong.

The magnetic field of Earth is opposite of the Geographic poles.
a) TRUE
b) FALSE
c)
d)

Which of the following will increase the strength of an electromagnet?
a) using blue wire instead of white
b) using a dead battery
c) adding more coils around the iron core (nail)
d) using a smaller battery

Pick the following statement that is FALSE
a) Magnetic Field Lines travel from the North pole to the South.
b) The poles of a magnet are the strongest parts.
c) Adding more coils to an electromagnet will increase its strength.
d) Electromagnets CANNOT be turned off

Pick the following statement that is FALSE
a) The Earth's magnetic field looks similar to a bar magnet's field.
b) An electromagnet can be turned ON and OFF.
c) The Earth's Magnetic Field has never reversed and will never reverse.
d) The poles of a Magnet are the Strongest Parts

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