What is electromagnetism defined as?
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The production of a magnetic field by current flowing in a conductor.
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What is electromagnetism defined as?
The production of a magnetic field by current flowing in a conductor.
What does Lenz’s law describe?
The direction of the induced electromotive force is opposite to the rate of change of magnetic flux.
What does Ampere’s force law explain?
How electric motors work and the force experienced by a wire.
What is the Lorentz force?
The force acting on electrons in a wire when they are pulled in a magnetic field.
What is the Curie point for magnetite?
About 570 degrees Celsius (1,060 K).
How does the speed of magnetic field change affect voltage?
The faster the magnetic field change, the greater the voltage in the circuit.
What is induced electromotive force?
The generation of a potential difference in a coil due to changes in magnetic flux.
What does magnetic flux (𝝓) represent?
The number of arrows, measured in Weber (Wb).
What is the Curie temperature?
The temperature at which certain magnetic materials undergo a sharp change in their magnetic properties.
What materials are considered ferromagnetic?
Materials that can retain their magnetic properties when the magnetic field is removed, like iron and nickel.
What does the right-hand rule indicate in magnetic fields?
The thumb points in the direction of current, and fingers curl in the direction of the magnetic field.
What does Faraday’s law of electromagnetic induction state?
Any change in the electric field over time will induce a voltage and current in a circuit.
What is the direction of magnetic field lines?
From the north pole to the south pole.
What is magnetic field strength (B) measured in?
Tesla (T).
What are paramagnetic materials?
Materials that cannot retain magnetic properties when the magnetic field is removed.
What is MRI and its significance in medicine?
Magnetic resonance imaging is a diagnostic imaging system that has improved therapeutic management of various pathophysiological processes.
What principle does MRI utilize?
The principles of nuclear magnetic resonance.
What is a magnetic field
Magnetic field is the are around a magnet in which there is a magnetic force
When is a magnetic field created?
Magnetic field is created when electric charge starts to move
