THE RESISTOR Forward characteristic Reverse characteristic Circuit.

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Presentation transcript:

THE RESISTOR Forward characteristic Reverse characteristic Circuit

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

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

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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

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