UNIT 8 - Electricity Part 1
Standards:
SP5. Students will evaluate relationships between electrical and magnetic forces.
SP5a. Describe the transformation of mechanical energy into electrical energy and the transmission of electrical energy.
SP5b. Determine the relationship among potential difference, current, and resistance in a direct current circuit.
SP5c. Determine equivalent resistance in series and parallel circuits.
SP5d. Determine the relationship between moving electric charges and magnetic fields.
SP6d. Describe the gravitational field surrounding a large mass and its effect on a ray of light.
SP5. Students will evaluate relationships between electrical and magnetic forces.
SP5a. Describe the transformation of mechanical energy into electrical energy and the transmission of electrical energy.
SP5b. Determine the relationship among potential difference, current, and resistance in a direct current circuit.
SP5c. Determine equivalent resistance in series and parallel circuits.
SP5d. Determine the relationship between moving electric charges and magnetic fields.
SP6d. Describe the gravitational field surrounding a large mass and its effect on a ray of light.
Unit Summary
One of most interesting thing I have learned about this unit is about how the old style TV’s worked. I thought that was so amazing because it showed me how thing I learned in school can be tied to the real world. I have learned what a proton will experience when place in an electrical field. I have also learned to calculate the electric field using the formula E=Fe/q. Overall this unit has been really interesting because it can be connected to the world. I enjoyed the labs we have completed throughout the unit.
Key Vocabulary
Coulombs -1.6x10^-19 electron 1.6x10^-19 proton.
Attractive Forces -Opposite charges attract.
Repulsive Forces - like charges repel.
Conductors- Material that allow for free flow of electrons.
Insulator - Material that do not allow free flow of electrons
Three basic ways to transfer charge
1. Friction- by touching two insulators.
2. Contact - by touching two conductors.
3. Induction - by bringing a charged object near a conductor.
*Whenever charges are transferred, the total amount of charge involved always remains the same. This is called the Law of Conservation.
Formulas:
Coulomb's law
F= kq1q2/d^2
F= electric force
K= 9x10^9
q= charge in columbs
D= distance
Electric Field
E= F/q2
E=K (Qp) (Q)/ R^2
d= radius
Electric Potential
V=EPE/q=W/q
joule/coulomb=1 volt(V)
Work= Triangle PE
Work = Triangle KE
KE= 1/2MVR
PE= mgh
One of most interesting thing I have learned about this unit is about how the old style TV’s worked. I thought that was so amazing because it showed me how thing I learned in school can be tied to the real world. I have learned what a proton will experience when place in an electrical field. I have also learned to calculate the electric field using the formula E=Fe/q. Overall this unit has been really interesting because it can be connected to the world. I enjoyed the labs we have completed throughout the unit.
Key Vocabulary
Coulombs -1.6x10^-19 electron 1.6x10^-19 proton.
Attractive Forces -Opposite charges attract.
Repulsive Forces - like charges repel.
Conductors- Material that allow for free flow of electrons.
Insulator - Material that do not allow free flow of electrons
Three basic ways to transfer charge
1. Friction- by touching two insulators.
2. Contact - by touching two conductors.
3. Induction - by bringing a charged object near a conductor.
*Whenever charges are transferred, the total amount of charge involved always remains the same. This is called the Law of Conservation.
Formulas:
Coulomb's law
F= kq1q2/d^2
F= electric force
K= 9x10^9
q= charge in columbs
D= distance
Electric Field
E= F/q2
E=K (Qp) (Q)/ R^2
d= radius
Electric Potential
V=EPE/q=W/q
joule/coulomb=1 volt(V)
Work= Triangle PE
Work = Triangle KE
KE= 1/2MVR
PE= mgh
Article - How It Works: Old Style TV’s
Article Summary: This article explains how the old box TV’s worked. The ingenious science behind, producing a phenomenal product that has changed the way America spends it time. No person has been attributed with the creation of the television. It’s a work from many field combined to produce a wonderful product. In the electrical circuit through which current flows, there is a negatively charged end and a positive charged end. In the regular cathode ray tube fires an electron from the positive charge panel which is attracted to the negative one. The electrified copper windings create a magnetic field which guides the electron towards the place on the screen. This process is repeated. This creates the picture you see in your television. ( Couple of pictures are shown down below to explain how a tv works.)
Article Summary: This article explains how the old box TV’s worked. The ingenious science behind, producing a phenomenal product that has changed the way America spends it time. No person has been attributed with the creation of the television. It’s a work from many field combined to produce a wonderful product. In the electrical circuit through which current flows, there is a negatively charged end and a positive charged end. In the regular cathode ray tube fires an electron from the positive charge panel which is attracted to the negative one. The electrified copper windings create a magnetic field which guides the electron towards the place on the screen. This process is repeated. This creates the picture you see in your television. ( Couple of pictures are shown down below to explain how a tv works.)