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Ohms Law

Terms in this set (25)

Ohms Law
A law that states current/ voltage and resistance are mathematically related
Resistance
The opposition to the flow of electrical charge
Resistance Formula
R=V/I
Current
The flow of charge, Rate at which charges pass a given point
Current Formula
I=V/R
Voltage
the amount of potential energy between two points (difference in charge)
Voltage Formula
V=IR
Unit for Resistance
Ohms
Unit for Current
Amps
Unit for Voltage
volts
Resistance symbol
R
Current symbol
I
Voltage symbol
V
Wires that are good (conductors/ insulators) have high resistance
insulators
Wires that are good (conductors/ insulators) have low resistance
conductors
Resistance depends on ...
Material/ Thickness/ Length/ Temperature
Long wires have _______ resistance
high
Short Wires have __________ resistance
low
If you increase resistance what happens to current?
decreases
If you increase voltage what happens to current?
increase
Ohms symbol
(Thick/ Thin) wires have high resistance
Thin
(Thick/ Thin) wires have low resistance
Thick
(Hot/ Cold) wires have high resistance
Hot
(Hot/ Cold) wires have low resistance
Cold
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