Electromagnets
A wire wrapped around a bar magnet made from a ferromagnetic material.
What is an electromagnet?
An area where a magnetic force can be detected.
What is a magnetic field?
Objects that exert a magnetic force.
What is a magnet?
The method of charging electronic devices without the need for a physical connection.
What is wireless charging?
Electricity that builds up on an object.
What is static electricity?
The wire wrapped around a nail in an electromagnet.
What is a solenoid?
The shape a magnetic field forms around a wire.
What is a circle?
Poles in a magnet that attract each other.
What are unlike poles?
The first person to demonstrate wireless charging.
Who is Nikola Tesla?
Electricity that moves from one place to another.
What is current electricity?
A real life use of an electromagnet.
What is an electric motor in an MRI machine?
Earth's magnetic field creates a protective sphere around Earth.
What is the magnetosphere?
The strongest part of a magnet.
What are the poles?
What is wireless charging limitations?
The path that charges need to move.
What is electric current?
This happens to the magnetic field when the electric current is turned off.
What is the magnetic field disappears completely?
Magnetic fields affcect things like iron and steel in this way.
What is the atoms within the material align their magnetic domains?
A substance that can be highly magnetized.
What is a ferromagnetic material?
The main components involved in wireless charging.
What is a transmitter coil, receiver coil and alignment?
The device used to measure voltage.
What is a voltmeter?
This principle describes how a moving electric charge produces a magnetic field.
What is Ampere's Law?
The Earth's magnetic field protects life on Earth from these high-energy particles.
What are cosmic rays?
This is the term for the natural magnetic field generated by certain minerals like magnetite.
What is natural magnetism?
The future potential for wireless charging in everyday technology.
What is extended range charging, faster charging, and smart power management?
The type of circuit provides multiple paths for current to follow.
What is a parallel circuit?