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Circuit (Resistivity of the Wire) - Coggle Diagram
Circuit (Resistivity of the Wire)
Prior Knowledge
Resistivity
Resistivity is the Materials quantity that shows how strong a material oppose to the flow of electric current.
Formula of the Resisitivity
Cross Sectional Area
Cross sectional Area is the area of the 2 dimensional object of the 3 dimensional object and is sliced perpendicular in a specific access
There are Two Formulas for the Cross secional Area
Radius is the straight line from the Center of the circle to the Circumference of the circle.
Diameter is the straight line between the circumference of the circle
Resistance
Resistance is the Ratio of the Potential Difference of the Circuit and the flow of Electrons in the wire.
Potential Difference is the amount of energy that is carried by electrons between two points and it is measured using Volts
The way to measure Potential difference is to use Voltage
The Current is the Flow of Electrons in the wire and is measured using Amps
The way to measure Current is to use an Ammeter
There are Two Resistance Equation
Ohms Law
Ohms law states that the potential difference is directly proportional to the flow of the electrons
Kirchoff's First Law
The sum of the current entering the junction is equal to the current out of the junction
Parrallel Circuit (Total Current = Current 1 + Current 2 +...)
Series Circuit (Total Current= Current 1= Current 2=...)
Type of Circuits
Parrallel Circuits
I1 +I2 +I3...
1/R1 +1/R2 +...
Vt=V1=V2=...
Series Circuit
Vt=V1+V2+...
It=I1=I2=...
Rt=R1 + R2 +...
Factors
The Length of the Wire
The length of the wire affects the resistivity of the wire as the wire increases, the resistivity decreases
Wire Diameter
Affects the Area of the crossection of the wire due to finding the radius of the wire
Current Amperage
Affects the Potential Difference which also affects calculating the resistance and the resistivity of the wire
Electric circuit Wrapped around like a knot
Afftects the potential difference because the electrons goes around the knot
Safety
Cut in the Wire
Can Cause Electrical Fires
Major Heat Generation in the wire
Heat generation of the wire would cause the wire to burn or if touching the wire would affect the body. .
Power Supply On
If the power supply is left open, then the resistors would heat up which then will create electrical fires
Equipment
Different Types of Wire
Volmeter
Resistors
Lightbulbs
Halogen Light Bulbs
Normal Resistors
More Resistance than Lightbulbs
Electrical Cables
Switch
Ammeter
Power Supply
Wires
