1. PARALLEL CIRCUITS

2. rules
The total current from the battery is equal to
the current flowing through each resistor
added together
(it splits at the junction)
the voltage is the same across each part
(and equal to the supply voltage)

3. 3V
Question 1 - - - - - - - V1 - - - - - - V2 - - -
the voltage is the same across each part
(and equal to the supply voltage) V1 V2 = =

4. - - - - - - - - - - - - - - - - 4A Z X Y X Y Z = = =
Question 2 - 4A - - - Z - - - -
These bulbs are identical - - - - X - - - - Y
In a parallel circuit the current is shared out
The current in each branch always adds up to
the current drawn from the supply X Y Z = = =

5. 3V
Question 3 X 4A 3V 2A Z Y X Y = = Z =

6. Is the current always
shared out equally?

7. Question 4 - - - 4A - - - 4A - - - - - - - - 3A - - X X =

8. = = 4A Z Y 1A Y Z The amount of current flowing through each
Question 5 4A Z Y 1A
The amount of current flowing through each
branch depends on the resistance.
The larger the resistance the smaller the current Y Z = =

9. Rules you should remember and use
The total current from the battery is equal to
the current flowing through each resistor
added together
(it splits at the junction)
the voltage is the same across each part
(and equal to the supply voltage)

10. END

11. Answers
1 V1=3V and V2=3V
2 X=2A, Y=2A and Z=4A
3 X = 4A, Y=2A and Z=3V
4 X=1A
5 Y=3A and Z=4A