Magnets Flashcards
Permanent magnets produce their own _______ ______.
Induced magnetic magnets become a ______ when placed in a _______ ______. When removed from a field, they lose their ______ quickly.
magnetic field
magnet
magnetic field
magnetism
What is flux density?
The strength and direction of the magnetic field around a magnet or an electric current.
What is the motor effect?
When a current carrying conductor is placed in a magnetic field experiences a force.
The force acting can be increased by?
Using a stronger magnet.
How do you make a force act in the opposite direction?
2 ways
Reverse polarity or connect the battery the other way around.
The equation for force is:
Force = ____________________
magnetic flux density x current x length
What does the thumb represent?
Movement or force.
What does the index finger represent?
Magnetic field.
What does the middle finger represent?
Current (conductor).
What is a solenoid?
A straight coil of wire that carries an electric current to create a magnetic field.
What is an electromagnet?
A solenoid with an iron core.
Why is the iron core used with a solenoid to create an electromagnet?
The iron core increases the solenoid’s magnetic field strength.
