Electricity - Circuit Rules - smart phone physics

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  • Created by: Mal
  • Created on: 19-03-14 14:02
Preview of Electricity - Circuit Rules - smart phone physics

First 39 words of the document:

Circuit rules
+
I
R1 R2 R3
The electric current is the
same at all points around
a series circuit.
Component p.d's add up to
equal supply EMF.

Other pages in this set

Page 2

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Circuit Rules
+
V
The potential difference is
the same across all
components connected in
parallel.…read more

Page 3

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Circuit Rules
+
I I
I1
I2
I3
Total current drawn from
the power supply equals
the sum of the individual
component currents.…read more

Page 4

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Resistor combinations
In series:
Rtotal = R1 + R2 + R3 +...…read more

Page 5

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Resistor combinations
In parallel:
1/Rtotal = 1/R1 + 1/R2 +...
Potential difference is the
same across all
components connected in
parallel.…read more

Page 6

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Potential Divider
R1
V1
R2 V2
V2 = V1 x R2 /(R1 + R2)
R1 or R2 may be a variable
resistor, thermistor or
L.D.…read more

Page 7

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Electromotive Force
Electromotive Force is the
term used for the electrical
potential difference across
any device which acts as a
SOURCE of electrical
energy. This includes
batteries, solar cells,
generators etc.…read more

Page 8

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Electromotive Force
Electromotive Force is the
energy transferred (from
other forms into electrical)
per unit charge.
= E/Q
1 Volt (V) is 1 Joule per
Coulomb.…read more

Page 9

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Source of EMF
So the symbol used for a
battery (or rather a single
cell)...
...…read more

Page 10

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Real cell
Strictly speaking, a real
cell should be drawn...
r
...…read more

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