1. THE RESISTOR
Forward
characteristic
Reverse
characteristic
Circuit

2. A V + 12 volt d.c. supply _ Ammeter Fixed Resistor Variable resistor
Ammeters are always connected in series
and measure the current flowing through the device
(in amps)
Voltmeters are always connected to each
side of the device (in parallel) and measure the
voltage (or potential difference) across the
device. V
Voltmeter

3. Potential Difference (volts) Current (m A) A 0.0 10 1.5 V 19 3.0 4.5_ +
Potential
Difference (volts)
Current
(m A)
34mA
10mA
40mA
51mA
0mA
19mA A
0.0 10
1.5
4.5V
3.0V
7.5V
6.0V
0.0V
1.5V V 19
3.0
4.5 34
6.0 40
7.5 51

4. previous
next
smart

5. Potential Difference (volts) Current (m A) A 0.0 -10 -1.5 V -20 -3.0_ +
Potential
Difference (volts)
Current
(m A)
-31 mA
-10 mA
-40 mA
-50 mA
0mA
-20 mA A
0.0
-10
-1.5
-4.5 V
-3.0 V
-7.5 V
-6.0 V
0.0V
-1.5 V V
-20
-3.0
-4.5
-31
-6.0
-40
-7.5
-50

6. Current
(I) in mA
Forward
characteristic
p.d. (V) in volts
Reverse
characteristic