Factors affecting current flow

1. Factors affecting current flow
• Bill decides to rewire his house, but he is not
sure how to set up the wiring for the electrical
appliances. His friend Sam advises him to use
a parallel circuit because the electricity bill is
less in a parallel circuit than in a series circuit.
Is Sam correct?

2. Construct your own lab circuit (Series
and parallel)
• http://www.physics-chemistry-interactive-
flash-
animation.com/electricity_electromagnetism_
interactive/components_circuits_association-
series_parallel.htm

3. •How do the
components in an
electric circuit affect the
electric current?

4. Brightness of bulb
• depends on Electric current flowing through it
• Higher the current brighter the bulb
• Lets demonstrate first while changing number
of batteries

5. Number of batteries
More number of batteries brighter the bulbs will be

6. Brightness of bulb
• Lets demonstrate while changing number of
bulbs

7. Number of bulbs
More bulbs less current (Series circuit)

8. Brightness of bulb
• Lets demonstrate while changing thickness of
wires

10. Result
The current will flow more easily
through a thick
wire than through a thin wire of the
same material when connected to
the same source. ... A thick wire has
a greater diameter and hence lesser
resistance making
the current to flow through it more
easily

11. Will this circuit work?

12. Length of wire
1. Length of wire definitely have effect
on current.
2. Resistance is directly proportional to length.
3. As the length increases, resistance increases,
as a result current decreases.