edited this file and glad to share it

1. types of circuit
There are two types of electrical circuits;
SERIES CIRCUITS PARALLEL CIRCUITS

2. SERIES CIRCUITS
Current has only one route- from the source
through several loads and back to the source.
If one bulb ‘blows’ it breaks the whole
circuit and all the bulbs go out.

3. measuring current
Electric Current (I) is measured
using an ammeter which is
connected in series with the loads.
A

4. PARALLEL CIRCUITS
The current from the source divides to
each load in separate paths and goes
back to the source.
If one bulb ‘burns out’ the other bulbs or loads
will still work.

7. measuring current
This is how we draw an ammeter in a circuit.
A
A
SERIES CIRCUIT PARALLEL CIRCUIT

8. measuring current
SERIES CIRCUIT
current is the same
at all points in the
circuit.
PARALLEL CIRCUIT
2A 2A
2A
current is shared
between the
components
2A 2A
1A
1A

9. copy the following circuits and fill in the
missing ammeter readings.
?
?
4A
4A
4A
? 3A
1A
?
1A
?
3A
1A

10. measuring voltage
The ‘electrical push’ which the cell gives
to the current is called the voltage. It is
measured in volts (V) on a voltmeter
V

12. measuring voltage
Unlike an ammeter a voltmeter is
connected across the components
The term Potential Difference (pd)
refers to voltage.

13. measuring voltage
This is how we draw a voltmeter in a circuit.
V
V
SERIES CIRCUIT PARALLEL CIRCUIT

14. V
measuring voltage
V
V
V

15. series circuit
• voltage is shared between the components
1.5V
1.5V
3V

16. parallel circuit
• voltage is the same in all parts of the circuit.
3V
3V
3V

17. measuring current & voltage
copy the following circuits on the
next two slides.
complete the missing current and
voltage readings.
remember the rules for current
and voltage in series and parallel
circuits.

18. measuring current & voltage
6V
V V
4A
A
A
a)

19. measuring current & voltage
6V
4A A
V
V
A
A
b)

20. measuring current & voltage
V
2A A
4.5 V
V
1 A
A
c)

21. measuring current & voltage
12 V
V
V
2A A
1 A
A
d)
V
A

22. __V
__V
3A
__V
__A
__V __V
__A __A __A
24 V
__V
e)