1. CHARACTERISTICS

2. Current
(A)
diode
bulb
Voltage
(pd)
Fixed
resistor

3. Fixed
resistors

4. Small voltage to push the charge- - - - - - - - 2A 2V

5. - - - - - - - - 4A 4V Double the voltage to push the charge
The charge flows twice
as fast and the
current doubles 4V

6. - - - - - - - - -4A -4V Reverse the voltage to push the charge
The current remains the
same size but changes
direction
(notice the negative signs)
-4V

7. Bulbs

8. Small voltage to push the charge- - - - - - - - 2A 2V

9. - - - - - - - - 4V 2.7A Double the voltage to push the charge
I’m really
hot! - - -
2.7A
The current gets bigger
but it doesn’t double 4V

10. - - - - - - - - -4V -2.7A Reverse the voltage pushing the charge
I’m really
hot! - - -
-2.7A
The current remains the
same size (2.7A) but it
changes direction
(notice the negative signs)
-4V

11. Diodes

12. Small voltage to push the charge- - - - - - - - 4A 2V

13. - - - - - - - - 4V 80A Double the voltage to push the charge
The diode lets a huge
current through 4V

14. - - - - - - - - -4V 0A Changing the direction of the voltage (push)
The diode blocks all
current flow.
It acts like a one way
system for the current
-4V

15. Current
(A)
Voltage
(pd)

16. Summary
A ___________ produces a straight line graph.
Doubling the voltage (pd) _______ the current.
A bulb produces a _____.
Doubling the voltage (pd) ____ than doubles
the current.
The bulb limits the increase in current because
it gets very ___
The _____ allows current to flow very easily if
it is connected the right way round.
If the diode is turned round then __ current
flows.
fixed resistor
doubles
curve
less
hot
diode no