Investigate how p.d affects current in resistor

• Potential difference is same as


  Voltage
• Potential difference does...


  -pushed charge(or electrons around) and supplies charge with energy to carry
• What does variable resistor do?


  Vary p.d across resistor and bulb
• What is independent variable 


  Potential difference
• What is dependent variable 


  Current
• What is control?


  Variable
• Conclusion

  As I increase p.d current increases linearly
• Low resistance =


  Low line
• High resistance =


  Higher line
• What does resistor occur between?


  The collisions of moving electrons and the positive ions in the wire
• Why does the filament get hotter in the bulb, what do you increase

  Potential difference
• The filament gets hotter and the positive ions vibrate more...


  So electrons move increasing resistance
• Diode is a semi conductor
• Current flows if diode is right way
• No current Ifq diode is wrong 2ay
• If diode is connected wrong way, what happens to resistance and current,?


  Massive resistance so no current

  
• Diode is wrong way so whar happens to resistance and no current?


  Low resistance and current fasts

  
• Sem conductor only conducts when conditions are right
• Sem conductor 


  1)diode 2)LDRA(Light dependent resitor) 3),thermistor
• LDR conclusion 


  As light intensity increases the resistance decreases non-linearly(light energy increase number of delocalsied electorns so resitance decrease)
• LDR graph: 0 V = 0 V, 1 V = 10 V, 2 V = 20 V

  
• 3)thermistor conclusion 


  As tempature increases resistance decreases non-linearly