I-V Characteristics
Q1.
A circuit was set up as shown in the diagram.
 
(a)     The table gives the current through three of the ammeters. Complete the table to show the current through the other two ammeters.
 
Ammeter	Reading on ammeter in amps	
Al	0.2	
A2	0.6	
A3	0.3	
A4	 	
A5	 	
(2)
(b)     The reading on the voltmeter is 12 V.
What is the resistance of R2?
Show your working and include the correct unit.
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Resistance = ____________________
(3)
(c)     In the circuit above, the resistor R2 burned out and current stopped flowing in it. There was no other change to the circuit.
Complete the table below to show the readings on the ammeters after this took place.
 
Ammeter	Reading on ammeter in amps	
Al	0.2	
A2	0.0	
A3	 	
A4	 	
A5	 	
(3)
(Total 8 marks)