Ohms Law

Resistance:

• opposition offered by a material to the flow of current
  
  
  

Ohm:

• basic unit of resistance measure equal to that resistance which allow 1 Amp of current to flow when EMF of 1 volt is applied across the resistance
  
  
  

Ohm’s law States:

• with constant resistance, lower voltage gives small current, high voltage gives larger current
• constant EMF, lower resistance passes large current, higher resistance passes small current
• the current flowing in a circuit is directly proportional to the voltage (EMF) and inversely proportional to resistance

I = E/R

E = I x R

R = E/I