resistance Flashcards

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1
Q

what is resistance

A

its is the measure if the opposition to the flow of charge through a conductor

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2
Q

what is resistance measured in

A

ohms

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3
Q

what does a reistor do to potential difference

A

its coverts it to other forms

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4
Q

state ohms law

A

the current through the conductor s directly proportional to the potential difference across its ends, provided the temperature remains constant

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5
Q

how do u calculate current , voltage , resistance

A

I = v/R

V = I x R

R = v/I

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6
Q

list and explain the factors affecting resistance

A

temperature - the HIGHER the temp the GREATER the resistance of a metallic conductor.

semi conductor - HIGHER temp the LOWER the resistance

length of conductor - the LONGER the conductor the GREATER the resistance

width of conductor - THICKER the conductor the LOWER the resistance

type of material

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