# Science

An electromagnet is the most powerful type of magnet there is . It is a magnet with a current running through it that can be turned on and off , Why might it be useful to be able to turn the electromagnet on and off ?
To control the strength of the magnet
To not waste electricity
To latch onto and let go of objects
To reduce wearing out of the magnet over time

1. 👍
2. 👎
3. 👁
1. c
Have you not seen these huge cranes that have an electromagnet on the end of a boom that is used in picking up metals and loading dump trucks?

1. 👍
2. 👎
👤
DrBob222

1. 👍
2. 👎
3. OK I'll post them when I get dont

1. 👍
2. 👎
1.To latch onto and let go of objects
2.How quickly electrical energy moves in a circuit
3.When a current runs through a conductor
4.Elections are moved thorough a circuit creating that current interacts with a magnet moving the conductor in the orientation of the field
5.electromagnetic field

100% correct guys and girls

1. 👍
2. 👎
5. He is right ^^

1. 👍
2. 👎
6. They are correct ^^

1. 👍
2. 👎

## Similar Questions

1. ### science

An advantage of using an electromagnet, shown on the crane in the image below, instead of a regular magnet to move cars in a junkyard is that an electromagnet can easily be turned on and off.

2. ### physics

Moving a magnet inside a coil of wire will induce a voltage in the coil. How is the voltage in the coil increased? by moving the magnet inside the coil of wire more slowly by moving the magnet inside the coil of wire more rapidly

3. ### magnetism

Moving a magnet inside a coil of wire will induce a voltage in the coil. How can the voltage in coil be increased? move the magnet inside the coil of wire more slowly hold the magnet stationary move the coil of wire slowly and

4. ### Science

What is the relationship between number of loops on an electromagnet and the strength of the magnet? Can you help e or break this down for me please? @Ms.Sue thank you

1. ### science

an advantage of using an electromagnet shown on the crane the image below instead of a regular magnet to move cars in a junk yard is that an electromagnet can easily be turned on and of

2. ### science

An electromagnet is a coil of wire with a current running through it. This creates an electromagnetic field. An additional magnet and its poles interact with the electromagnet, causing an electromagnetic motor to turn. What are

3. ### Physics--PLZ HELP!

When the switch is closed in a circuit, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is ---- -- -- -- -- -- -- A) a magnetic dipole. B) not

4. ### SCIENCE

1. How does increasing the electric current affect the strength of an electromagnet? 2. What three ways are electromagnets different than magnets? 3. Explain the relationship between the number of loops in an electromagnet and the

1. ### Science

An electromagnet is ____. A. a permanent magnet B. made with bar magnets C. able to attract all metal substances D. only operating when the current is on I think it is D..?

2. ### Physics

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 26.1 N, the weight of each magnet is 8.99 N,

3. ### science

An electromagnet is a coil of wire with a current running through it. This creates an electromagnetic field. An additional magnet and its poles interact with the electromagnet, causing an electromagnetic motor to turn. What are

4. ### physics

Magnet A has twice the magnetic field strength of magnet B and at a certain distance pulls on magnet B with a force of 75 N. With how much force, then, does magnet B pull on magnet A?