Resistivity, Ohms Law and Resistance in Series and Parallel

Presentation

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Science

•

12th Grade

•

Practice Problem

•

Easy

•

NGSS

HS-PS2-5, HS-PS3-5, HS-PS2-4

Standards-aligned

John Catalan

Used 12+ times

FREE Resource

20 Slides • 5 Questions

Resistivity, Ohms Law and Circuit Construction

John Rudolf D. Catalan

Special Science Teacher I

Engage

Poll

Which of the following illustrations can conduct electricity?

Poll

What do you think the characteristics of a conductor?

Composed of Plastic

Malleable

Metallic in Nature

Composed of Electrons, Protons and Ions

Ductile

Recall

That a conductor is any material that can conduct (transfer electron) from one place to another.

Multiple Choice

What do you call the movement of electron across the potential differences of a particular source (battery)

Resistance

Capacitance

Voltage

Current

KE (Increase) = Velocity? , Stored Energy?

PE (Increase) = Velocity? , Stored Energy?

Explore

Open Ended

When you think about the word "resistance", what comes to your mind if you recall that word?

Type response here

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω)

Open Ended

So..... If we apply more resistance to the wire, what will happen to the flow of energy ?

Type response here

Explain

Voltage will be the distance of the tube in order to flow water from one place to another (due to gravity)

Current will be the strength of water flow based on the characteristics of the tube (diameter, size , structure)

Resistance will act as a "gauge" that will limit the flow of water

Sample Problems

Compute the resistance of the certain material (iron) that is 15 m length and 4.5 cm in diameter (resistivity of the iron : 1.0 x 10^-7 Ω/m
An electrician wishes to cut a copper wire (ρ=1.72 x 10^-8Ω/m)that has no more than 10Ω of resistance. The wire has a radius of 0.725mm. Approximately what length of wire has a resistance equal to the maximum 10Ω ?

Resistance in Series and Parallel

Activity

Series and Parallel Connection Construction

Resistivity, Ohms Law and Circuit Construction

John Rudolf D. Catalan

Special Science Teacher I

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