Chp 4 Flashcards
What is Ohms law formula?
V=I×R
what is the best conductor?
Silver
What happens as resistance decreases?
The area conductor increases. If the conductor decreases the resistance increases.
What is magnetism?
Is the mutual attraction of two iron based materials.
What is heat capacity?
Is the ability of a material to absorb thermal energy.
What is oxidation?
Reaction between metal and oxygen without water present.
what is galvanic corrosion?
Is 2 dissimilar metals.
What is pitting corrosiin?
results in cavities or pits in localized areas.
What is reflection?
Is the ability of a material to direct light back towards its original source.
What is specular reflection?
Is when a smooth surface, like a mirror reflects light back at the same angle.
What is diffuse reflection?
Is when a rough surface reflects light back in various directions.
What is absorption?
Is when a portion of light is absorbed by a material.
What is photoelectric?
Effect happens when electrons are emitted from a materials surface when hit by a light.
What is fluorescence?
Is a property that allows a material to glow after a ultraviolet light source is removed.
What is refraction?
Is the bending of a light ray when it passes from one medium (air);through another (water).
