Ohm's Law, Resistance

 Ohm's Law is used to calculate the relationship between voltage, current and resistance in an electric circuit.

Ohm's Law - V= I×R

V- Voltage (unit of potential difference)

I- Electric current

R- Resistance 


-> V= IR 

-> I=V/R 

-> R=V/I 



✓ Resistance 

Resistance is the restriction to the flow of electrons 

  SI unit- Ohm Ω 

R=V/I 

-> Size 

More length - More resistance

Less length - Less resistance

-> Thickness 

Thin - More resistance

Thick - Less resistance

-> Material 

Copper - Less resistance

Aluminum - More resistance

-> Temperature

More temperature - More resistance

Less temperature - less resistance 



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