charactistics of magnets
Uses of Magnetic Fields
Producing Electric Current
Superconductivity
science trivia
100
property of matter in which there is a force of attraction or repulsion between like or unlike poles
What is magnetism?
100
formed when an iron core is inserted into a coil and electrical current is passed through the coil
What is an electromagnet?
100
the process by which moving a wire through a magnetic field produces a current
What is electromagnetic induction?
100
material with no electrical resistance
What is a superconductor?
100
unit for 150 000 000 000m
What is a astronomical unit?
200
location of strongest magnetic force on bar magnet
What are the poles?
200
measures electrical current passing through a circuit
What is an ammeter?
200
converts mechanical energy into electrical energy
What is a generator?
200
some energy is lost due to this in a regular conductor
What is resistance or heat?
200
acclertation due to gravity
What is 9.8 meters per second squared?
300
the region around the magnet where magnetic forces act
What is a magnetic field?
300
measures potential difference in a circuit
What is a voltmeter?
300
current which flows only in one direction through a wire
What is direct current?
300
temperature at which a supercondutor works
What is critical temperture?
300
mathmatical representation of Newton's second law of motion
What is F = m x a?
400
group of atoms with aligned magnetic poles
What is magnetic domain?
400
device which changes electrical energy into mechanical energy
What is an electric motor?
400
currrent which reverses direction in a regular pattern
What is alternating current?
400
method for supercooling a superconductor to its critical temperature
What is submersion in liquid helium?
400
rating system which indicates a materials resistance to heat flow
What is R-value?
500
The polarity of Earth's south pole?
What is north?
500
reversing switch which rotates with the electromagnet and alternates the current in an electric motor
What is a commutaor?
500
increases or decreases the voltage of an alternating current
What is a transformer?
500
physical characteristic which causes problems in superconductors
What is brittle?
500
metric label for pressure
What is Pascals?
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