Transcript Power Point

 If
voltage remains the same and resistance
increases does the number of electrons
passing a point in the circuit in one second
(current, I) increase, decrease or stay the
same?
 Decrease
 When the turkey baster was filled with
water and held up and allowed to drain it
did so rather quickly.
 When paper towel was rolled up and placed
in the turkey baster it took much longer
for the water to flow out.
 If
voltage (V) in a circuit remains constant
and resistance(R) increases does current
(I) increase, decrease or stay the same?
 Decrease
 It is more difficult for the electrons to be
pushed through the circuit but the push
remains the same(voltage) so fewer
electrons pass a given point in the circuit in
one second
 Series
Circuits
There is only one pathway for
the current to travel
The current is the same at all
points along the circuit
As the number of light bulbs
increases, the potential
difference across each bulb
decreases and the bulbs burn
less brightly
If one bulb burns out the current stops
After 2 seconds which cup will have more water A,B or C?
They will have almost the same amount of water.
Which jug will empty first 1 or 2?
2
There is more than one
pathway for the current
The current splits into the
different pathways
The total current in the main
circuit is equal to the sum of
all the current in the parallel
branches (connectors)
The potential difference across each bulb equals the voltage
produced by the source
The brightness of the bulbs stay the same as more bulbs are
added so the battery must push out more electrons for each
additional light (pathway) added.
If one bulb burns out the remaining bulbs stay lit
 If
a 3 light 1 battery series circuit and a 3
light 1 battery parallel circuit were turned
on at the same time, which circuit would
stop working first? (note: all the lights and
batteries are the same)
 the parallel circuit