It's all about Attraction
These charges are attracted to each other.
What are opposites?
The poles of magnets
What are north and south?
In order to get a circuit to work, you must do this...
What is "close the circuit/attach both ends of the wire"?
Doing this to the coils of an electromagnet will increase its strength.
What is "increasing the number of coils"?
These slow the current and are measured in OHMS.
What is a resistor?
Like charges do this
What is repel?
Why a magnet can exert force over distance
What is "magnetic field?"
All electric circuits have at least these two parts...
One of the several advantages of using an electromagnet
What is "the ability to turn it on/off"?
When the current can flow in only one path. If one part breaks, the whole circuit doesn't work.
What is a "Series Circuit?"
A magnet will pick up an object that is made of:
A. plastic
B. iron
C. copper
What is B. Iron?
To construct an electromagnet you need an iron core, a power source, and ____
What is "a wire or other conductor"?
This part of a circuit can open or close a circuit
What is a switch?
When a current flows through a wire wrapped around an iron core, this is produced.
What is a "magnetic field"?
The rate of electron flow caused by voltage
What is an electrical "current"?
The needle of a compass is attracted to this and therefore points this way...
What is "north"?
The name of Earth's magnetic field
What is a magnetosphere?
These have very high resistance, so much so that wires are often wrapped by them.
What is an insulator?
When a piece of iron is wrapped by wire, its called this...
What is a solenoid?
The potential force between two points in an electric circuit.
What is "voltage?"
2 types of electricity
static electricity & current electricity
Magnetism produced by electric current is known as ______________
What is electromagnetism or electromagnetic induction?
An advantage of a parallel circuit
What is "when one light breaks or burns out, the whole circuit doesn't break?"?
The reason the earth has its own magnetic field
What is "its iron core?"
When the current can split into more than one path
What is a "parallel circuit?"