Component characteristics RP (P1)

Question 1

Filament lamp or resistor

Answer 1

Set up a circuit with a voltmeter, ammeter, variable resistor and bulb/resistor
Adjust the variable resistor to take readings from the voltmeter and ammeter
Switch the connections and continue

Question 2

Filament lamp graph

Answer 2

A curve with a positive gradient which is steepest near the origin, which it passes through and curves at the bottom left and right

Question 3

Resistor graph

Answer 3

A straight line with a positive gradient passing through the origin

Question 4

Diode method

Answer 4

Using the same circuit, add an extra resistor, replace the ammeter with a milliammeter and add a diode instead of a bulb/resistor
Record readings from the milliammeter and voltmeter while adjusting the variable resistor
Swap the connections and continue

Question 5

Ohm’s law

Answer 5

Potential difference is directly proportional to current in an ohmic conductor with a constant temperature

Question 6

Diode graph

Answer 6

A straight line through the origin with a slow increase until it suddenly starts increasing in a straight line when the potential difference is a few volts