List three changes you could make to the above device that would increase the strength of the magnetic field around the nail.
Question 7
7.
Question 8
8.
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
An atom with the same number of protons and electrons is neutral (has no overall charge).
True
False
Atoms can become charged when they gain or lose ____.
ions.
protons.
electrons.
neutrons.
An electromagnet is a _______ wrapped in electrical wire that is connected to a power source.
bar magnet
conductor
battery
ferromagnetic core (like iron)
The interaction between electricity and magnetism is called _____.
electromagnetism
magnicity
magic
static electricity
What kind of device is shown in the picture above?
electric motor
galvanometer
transformer
electromagnet
What do we call a coil of wire that carries an electric current?
generator
solenoid
transformer
galvanometer
Hans Oersted discovered that when a current flows through a wire, a(n) _____ is created around the wire.
magnetic field
electric field
compass
current
In the first image, the circuit is open. In the second image, Oersted closes the circuit. If Oersted were to reverse the direction of the current flowing through the wire, the red compass needle would move toward the _____.
S
E
W
N
The compass needle would not move.
Which of the following are advantages that electromagnets have over permanent magnets? Choose all that apply.
You can change the strength of an electromagnet.
You can reverse the magnetic poles of an electromagnet.
You can turn an electromagnet on and off.
You can pick up non-magnetic materials with an electromagnet.
The process of using a magnetic field to create an electric current in a wire is called _____.
electrostatic transmission.
electromagnetic transformation.
electromagnetic transduction.
electromagnetic induction.
Which of the following would reverse the current in the wire? Choose all that apply.
Pulling the south pole of the magnet out of the coil.
Pushing the north pole of the magnet into the coil.