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Magnetism and Electromagnetism
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Magnetism and Electromagnetism
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23 Questions

1.
A solenoid wrapped around an iron core

2. Advantages of transmitting electricity at high voltages

3. What influences the strength of a magnetic field around a wire with a current passing through it?

4.
iron, steel, cobalt, nickel

5.
A magnet that produces its own magnetic field

6.
decrease voltage (less secondary coils) for use by consumers

7.
a magnetized needle in line with the magnetic poles of the earth.

8.
When two magnetic objects have like poles facing each other.

9.
Type of current made by a generator

10.
A magnetic field is produced around it

11.
a device that converts electrical energy into mechanical energy/motion

12.
surrounds a magnet and is an invisible force of attraction or repulsion.

13. How can an electromagnet be made stronger?

14.
scrapyard crane, electric bell, electric motor

15.
increases voltage (more secondary coils) for transmission of power

16.
A primary coil and secondary coil wound around an iron core, changes voltage

17. Aligned domains makes something....

18.
A naturally occurring magnetic mineral.

19. Increase amount of coils, use a larger magnet, move the magnetic field faster

20.
When two magnetic objects are close to each other and opposite poles are facing each other.

21.
At the poles

22.
A machine that converts mechanical energy into electrical energy

23.
the armature is made of electromagnets that continually repel the magnets on the sides