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P2: Quiz 5
Click here for a printable PDF of the graphs in this quiz.

1)
a)
i) At a constant temperature, does the resistance of an ohmic conductor increase, decrease or stay the same?
ii) Give 2 examples of ohmic conductors.
b)
i) Draw the I-V characteristic graph for an ohmic conductor at a constant temperature on the graph below.
ii) Describe the relationship between the potential difference and current for an ohmic conductor at a constant temperature. Explain your answer.
​ 
 
2)
a) Draw the I-V characteristic graph for a filament bulb on the graph below.
b) Explain why the I-V graph for a filament bulb has the shape that it has.
 
 
3)
a) Draw the symbol for a diode.
b) Can a current pass through a diode in both directions?
c) Draw the I-V characteristic graph for a diode on the graph below.


​4) A student is going to undertake an experiment so that they can draw an I-V characteristic graph for a filament bulb. They use a battery, variable resistor, ammeter, voltmeter, filament bulb and some connecting wires.
a) Draw the circuit that the student can use to obtain the values for an I-V graph for a filament bulb.
b) Outline a method that the student can use to obtain the values in order to be able to draw an I-V graph for a filament bulb.

 
5) The graph below shows the I-V characteristics for two different ohmic conductors.
a) Find the resistance of ohmic conductor 1 (you can use any values on the line for ohmic conductor 1, but if you are unsure, use a potential difference of 2).
b) Find the resistance of ohmic conductor 2.
c) Fill in the gap in the sentence below with either “greater” or “lower”.
 
The steeper the line is for an ohmic conductor, the _________ the resistance is for the ohmic conductor.
 
d) On the above graph, draw a line for an ohmic conductor that has a greater resistance than both of the ohmic conductors (1 & 2).