Electromagnetism 1
Electromagnetism 2
Electromagnetism 3
Electromagnetism 4
Electromagnetism 5
100
When a current flows through a wire, this is produced.
What is a magnetic field?
100
Like poles of a magnet will ....
What is repel?
100
Electrons all rotating in the same direction, create a_________.
What is a magnetic field.
100
The ends of a magnet are called the______.
What is the poles?
100
A Maglev train slows/ down or stops by using.
What is regenerative braking (inverting the current, pushing the front of the Maglev and attracting its back)
200
This type of magnet is used in a junkyard(scrap yard) due to its ability to be________?
What is turned off.
200
A compass needle responds to a magnetic field, because the compass needle is.
What is magnetic?
200
Maglev trains use what magnetic type of system?
What is electromagnetic
200
If the nail in an electromagnet is replaced with a straw, will it still be an electromagnet?
what is no?
200
Which of these items is NOT needed to build an electromagnet?
A- Magnet B- Wire
C- A Battery D- Nail
What is a magnet?
300
If the current increase in the wire increase, this happens to the magnetic field?
A- Decreases B-Increases
C- Stays the Same D- Stops working
What is (B) increases.
300
An advantage of using an electromagnet.
What is the ability to turn it on and off?
300
Maglev trains technology is based on these two fundamental properties of magnets
What are attraction and repulsion.
300
Magnetism produced by electric current is known as this.
What is electromagnetism?
300
The difference between electromagnets and a permanent magnetic is______.
What is (electromagnets) have the ability to be turned off and on.
400
This is the reason the ends of a bar magnet have a stronger force.
What is the force is strongest at the poles?
400
the current direction through the wire is reversed, the direction of the magnetic field is______
What is reversed.
400
How are magnets used on a Maglev train to levitate?
What is repelling?
400
The maglev train technology work
It uses magnets to lift and propel the train.
400
The magnetic field around a straight wire carrying an electric current has a shape that is.......
A- Circular (shaped) B-Diamond Shape
C- Square shaped D- Oval Shaped
What is Circular
500
Is this piece of iron going to act as a magnet?
What is no?
500
These are the three ways to increase the strength of an electromagnet.
What is:
- increasing the number of turns in the coil
-using a larger iron core
- increasing the amount of current?
500
When a wire is exposed to a changing (rotating) magnetic field, this is produced.
What is an electrical current?
500
This is a conductive wire wrapped around a bar of iron or other ferromagnetic material.
What is an electromagnet?
500
To make the wire spin, in the battery motor, your magnetic fields are.....
What is:
perpendiclar
In opposite directions.