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Electric Circuits
- Current is the rate of flow of electric charge
- Current is when charges flow through conductors
- Equations
- Charge (Q) = Current (I) x Time (t)
- Voltage (V) = Energy (E) / Charge (Q)
- Resistance (R) = Voltage (V) / Current (I)
- Charge (Q) = Current (I) x Time (t)
- A parallel circuit is when a circuit has branches or junctions
- A series circuit is when all the components are in one loop
- The resistance of the circuit and the voltage
it is at determines how much current flows
through it
- Resistance is changed using resistors
- Fixed, Variable, LDR, thermistors
- Fixed, Variable, LDR, thermistors
- Resistance is changed using resistors
- Graphs
Annotations:
- Need to draw graphs
- For thermistors and LDR's
their resistance decreases
when the thing they are
measuring goes up, so for a
LDR, when the light gets
brighter its resistance falls
and for a thermistor, when it
gets hotter its resistance
falls.
- Power is the rate of conversion
- Power (P) = Voltage (V) x Current (I)
- Power (P) = Voltage (V) x Current (I)
- Fuses
- All appliances have these, they
cut off when the current gets too
high
- All appliances have these, they
cut off when the current gets too
high
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