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These are what magnetic lines of force are called
what is flux
The strength of an electromagnet is primarily proportional to this
What are ampere-turns
This term describes a materials ability to be magnetized
What is permeability
Magnetic lines of force tend to go around this type of material instead of through it
What is diamagnetic
If a thundercloud has a positive charge and the object on the ground has a negative charge, how will the current in the lightning bolt flow
what is ground to the cloud
According to the basic law of magnetism, unlike poles do this
What is attract
This hand rule is used to locate the north pole of an electromagnet
What is the right hand rule
This is the measure of a materials resistance to magnetism
What is reluctance
This type of circuit has very little resistance, allowing a large amount of current to flow
What is a short circuit
insulators are the only materials that can hold what kind of electrons
what are stationary electrons
According to the basic law of magnetism, like poles do this
What is repel
When all the molecules in a magnetic material are lined up and more current no longer increases field strength, the material has reached this state.
What is saturation
When electrons form a spin pattern, this happens to the magnetic field of the material.
What is increases
This type of resistors can have only one ohmic value.
What is a fixed resistor
This character of a resistor indicates the plus and minus limits of its ohmic value
What is tolerance
a variable resistor with two terminals is called
what is rheostat
a variable resistor with three terminals is called
What is potentiometer
what is used to represent fixed and variable resistors
what is electrical schematics
static electricity refers to electrons that are doing what
what is not moving
what type of fixed resistor is made by applying a film of carbon to a ceramic rod
What is carbon film
A lightning protection device that is grounded at one end, wit the other end close to but not touching the object to be protected is called
What is lightning arrestor
what is semiconductor
what causes a static charge in a clothes dryer
what is clothes moving through the dry air
A precipitator is a type of
what is air filter
The imbalance that occurs during what causes an object to either gain or lose electrons
What is static electricity