Chp 4 Flashcards

1
Q

What is Ohms law formula?

A

V=I×R

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2
Q

what is the best conductor?

A

Silver

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3
Q

What happens as resistance decreases?

A

The area conductor increases. If the conductor decreases the resistance increases.

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4
Q

What is magnetism?

A

Is the mutual attraction of two iron based materials.

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5
Q

What is heat capacity?

A

Is the ability of a material to absorb thermal energy.

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6
Q

What is oxidation?

A

Reaction between metal and oxygen without water present.

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7
Q

what is galvanic corrosion?

A

Is 2 dissimilar metals.

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8
Q

What is pitting corrosiin?

A

results in cavities or pits in localized areas.

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9
Q

What is reflection?

A

Is the ability of a material to direct light back towards its original source.

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10
Q

What is specular reflection?

A

Is when a smooth surface, like a mirror reflects light back at the same angle.

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11
Q

What is diffuse reflection?

A

Is when a rough surface reflects light back in various directions.

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12
Q

What is absorption?

A

Is when a portion of light is absorbed by a material.

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13
Q

What is photoelectric?

A

Effect happens when electrons are emitted from a materials surface when hit by a light.

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14
Q

What is fluorescence?

A

Is a property that allows a material to glow after a ultraviolet light source is removed.

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15
Q

What is refraction?

A

Is the bending of a light ray when it passes from one medium (air);through another (water).

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