Magnetism Flashcards
Flux lines are present and parallel to a conductor whenever current is passing through the conductor. T or F
False
The speed of Flux lines cutting through a conductor will affect the amount of voltage produced. T or F
True
What is the result when two or more parallel conductors carry current in the same direction ?
The conductors attract one another
What three factors affect the strength of an electromagnet?
Number of turns of wire, applied voltage and type of core material
Which if the following components operates by using a small amount of current to control a larger amount of current?
Relay
Which of the following components operates by using small amounts of current to control a larger amount of current?
Relay
Which of the following components operates using magnetism to slide a moveable iron core,
Solenoid
What BEST describes a basic principles of operation of an electric motor?
Flux lines with opposite directions repel eachother causing the armature to move.
Flux lines with the same direction repel each other causing the armature to move.
Flux lines with same direction repel eachother causing the armature to move
Flux lines are the strongest near the center of a magnet. T or F
False
Flux lines always run parallel to eachother. T or F
True
Flux lines repel one another when they have the same direction. T or F
True
Permeability is what describes the ability of a material to allow Flux lines to concentrate withing them. T or F
True
What causes a substance to become a permanent magnet?
The electron orbits of the material must all align
Voltage can be induced in a circuit which is not complete
True
Self induced voltage slows the building of a magnetic field in a coil. T or F
True
