Physics, 24.03.2021 21:40 martinjohnsond079
13. What property of electromagnets is NOT a property of permanent magnets:
2. Electromagnets contain iron.
b. Electromagnets can be turned on and off.
c. Electromagnets attract iron or materials that contain iron.
d. Electromagnets have a north pole that points to the north.
14. How do electromagnets differ from regular magnets?
a. They can be turned on and off
b. Their polarity can be reversed
c. Their strength can be changed
d. All the above
15. Which of the following could be used as the core of a simple electromagnet?
a. pencil
b. iron nail
c. aluminum foil
d. drinking straw
16. To change the polarity of an electromagnet, you would:
a. Reverse the current's direction
b. Reverse the direction in which the coil is wound
c. Remove the iron core from within the coil of wire
d. Turn the battery, or other power source, upside-down.
I need help on all questions
Answers: 1
Physics, 21.06.2019 13:00
The atoms in a sidewalk on a hot summer day are vibrating the atoms in the sidewalk on a freezing day in winter. a. more rapidly than b. more slowly than c. at the same speed as
Answers: 3
Physics, 21.06.2019 20:00
When someone slams her books on a table the kinect energy is transferred into vibrations that travel to your ears as sound waves which statement describes the movement of those waves
Answers: 1
Physics, 22.06.2019 12:00
If the new moon happens on january 15th, what shape will it be on february 6th?
Answers: 1
Physics, 22.06.2019 12:30
Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.
Answers: 1
13. What property of electromagnets is NOT a property of permanent magnets:
2. Electromagnets conta...
History, 20.09.2020 14:01
History, 20.09.2020 14:01
Mathematics, 20.09.2020 14:01
English, 20.09.2020 14:01
English, 20.09.2020 14:01
Chemistry, 20.09.2020 14:01
Chemistry, 20.09.2020 14:01
French, 20.09.2020 14:01
History, 20.09.2020 14:01
English, 20.09.2020 14:01
Mathematics, 20.09.2020 14:01
Chemistry, 20.09.2020 14:01