Electricity and Magneticism
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- How are electrical current and magnetism similar?
- A wire with a current has a magnetic field. Also, Iron fillings can map out a magnetic field around a wire with a current.
- Poles of a Magnet
- The ends of the magent
- Solenoid
- A coil wire with a current that acts as a bar magnet.
- Electric Currents
- Electric Currents produce a magnetic field. The relationship is electomagneticism. The electrons are moving through the wire.
- How to make an electromagnet
- You need a battery, wire, ferromagnet material. Wrap the wire around the ferromagnet material and connect both ends to the battery.
- What does a electic current produce?
- An electic current produces a magnetic field.
- Examples of electromagnets
- Electromagnets are used to record information onto audiotapes, videotapes, computer hard devices, credit cards.
- Repel
- When same charges face each other to push away
- When the direction of the current reverses does the direction of the magnetic field stay the same?
- False,the magnetic field reverses as well
- 3 Characteristics of an magnetic field produced by a current
- 1. The field can be turned on and or off 2. You can change the direction 3. The strength can be changed. The magnetic field around the current forms a cylinder around the wire by increasing number of loops of wire.
- Magnetite
- natural magnet with copper use.
- When iron is placed within a solenoid's magnetic field, the iron becomes the magnet?
- TRUE
- 4 ways to strengthen magnets
- 1. increase the current in the solenoid. 2. Add more loops of wire to the solenoid. 3. Wind the coils of the solenoid closer together. 4. Increase strength of an electromagnet by using a stronger ferromagnetic material for the cure.
- Electromagnets differ from permanent magnets
- Permanent magnets are forever and electromagents are only temporary.
- How can you tell that there is a current in a wire?
- You can tell because the iron fillings because the higher filling= more current. They map out the magnetic field produced by the current in the wire.
- What is electromagnetism?
- The relationship between electricity and magnetism.
- Solenoid Information
- The strength of the magnetic field increases as the number of the loops increases. Also the noth and south poles of a solenoid change with the direction of the current. If wire with a current is twisted into a loop, the magnetic field lines become bunched up inside the loop.
- Electromagnet
- It is a strong wire that can be turned on and off. A solenoid with a ferromagnetic core.
- If you wind a wire with a current into a coil what will happen?
- The magnetic field has changed to by the increasing amounts of loops.
- Currents
- Wires have currents when electricity is added. The needles of the compass change direction because a magnetic field is produced around a wire with a current.
- Attract
- When different charges face each other to come together.
- Hans Christian
- created the relationship between magnetism and electricity.
- How can magnetism be used to produce electricity?
- By turning the turbine which produces electricity by steam.