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What are some ways to increase the magnetic field strength?
Increase the size of the magnet. Increase the current passing through the wires (electromagnets) Increase the number of coils of the wire (electromagnets)
What can be done with an electromagnet that cannot be done with a regular permanent magnet?
Its strength can be easily manipulated (e.g. you can switch it off). Or the strength can be varied with the current. Electromagnets can reverse polarity (by reversing the current).
How are electromagnets different from magnets?
You can turn electromagnets on and off.
How do you reduce a magnet's strength?
Give it a sharp hit with a hammer.
How are electromagnets different from permanent magnet?
You can turn electromagnets on and off.
Do electromagnets lose strength?
Only once the electricity is switched off.
Can increase the strength of an electromagnets field by?
using a stronger ferromagnetic material for the core. :)
What are some ways to increase the magnetic field strength?
Increase the size of the magnet. Increase the current passing through the wires (electromagnets) Increase the number of coils of the wire (electromagnets)
How the strength of the electromagnets can be varied?
by increasing or decreasing the charge going through the coils or moving an iron core in and out of the coils.
What can be done with an electromagnet that cannot be done with a regular permanent magnet?
Its strength can be easily manipulated (e.g. you can switch it off). Or the strength can be varied with the current. Electromagnets can reverse polarity (by reversing the current).
What is the flow of electromagnets called?
Electromagnets
Does heat reduce the tensile strength of metal?
Heating a metal decreases the tensile strength and increases ductility
Do electromagnets affect glue?
Electromagnets do not affect glue.
How are electromagnets different from magnets?
You can turn electromagnets on and off.
Which of the following statement about electromagnets is true?
Electromagnets are temporary magnets that are created when electric current flows through a wire coil. The strength of an electromagnet can be increased by increasing the number of turns in the wire coil, increasing the current flowing through the coil, or by using a ferromagnetic core material.
How do you reduce a magnet's strength?
Give it a sharp hit with a hammer.
How do you reduce the strength of magnetic field?
you spread them apart.
