Magnets Question Preview (ID: 36891)

a) Very Strong

b) Very Big, but weak

c) Very small, but strong

d) very small and weak

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

a) repel

b) attract

c) none of the above

d) both repel and attract

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

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

a) It is symmetrical.

b) It can be reversed.

c) It protects the Earth from radiation.

d) It is very strong.

a) TRUE

b) FALSE

c)

d)

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

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

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