2.11
Subject: 2.11 2.11 ideal results 14 January 2011 16:20 >
[cid:image001.png@01CCCF90.A38DA0F0] 2.11 notes 24 November 2010 10:15
· 2.11 describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how this can be investigated experimentally Wires and resistors
[cid:image002.png@01CCCF90.A38DA0F0]
· Ohm's Law = "I is directly proportional to V for a conductor at constant temperature"
· Wires and resistors obey Ohm's Law so we say they are "Ohmic" components Filament lamp
[cid:image003.jpg@01CCCF90.A38DA0F0] [cid:image004.png@01CCCF90.A38DA0F0]
[cid:image005.png@01CCCF90.A38DA0F0] Diode
[cid:image006.png@01CCCF90.A38DA0F0]
· For a diode the graph is NOT a straight line so I is NOT directly proportional to V
· Because it does not obey Ohm's Law so we say that it is a "Non-ohmic" component
[cid:image001.png@01CCCF90.A38DA0F0] 2.11 notes 24 November 2010 10:15
· 2.11 describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how this can be investigated experimentally Wires and resistors
[cid:image002.png@01CCCF90.A38DA0F0]
· Ohm's Law = "I is directly proportional to V for a conductor at constant temperature"
· Wires and resistors obey Ohm's Law so we say they are "Ohmic" components Filament lamp
[cid:image003.jpg@01CCCF90.A38DA0F0] [cid:image004.png@01CCCF90.A38DA0F0]
[cid:image005.png@01CCCF90.A38DA0F0] Diode
[cid:image006.png@01CCCF90.A38DA0F0]
· For a diode the graph is NOT a straight line so I is NOT directly proportional to V
· Because it does not obey Ohm's Law so we say that it is a "Non-ohmic" component

