• The current above has a 10 volt power source. The value of the resisters are

r1= 1, r2= 5, r3= 101. What is the current across each resister?2. What is the total current?3. What is the complete resistance?4. What is the power going through the battery?

10/2 Warm up From yesterday’s exit slip

Tomorrow: BM assessmentNotebook check from 9/22

Using V= I * RP = I * V

• The voltage of the above is 6 volts, each resister is

• How could you calculate the power going through the circuit

• What makes something an insulator and a conductor?

• Conductors - materials where electrons can move anywhere

• Insulators – atoms hold electrons tightly•

• How does a battery work?

• What are the requirements for a circuit?• a voltage source• A conductor

The voltage from the battery pushed the electrons through the circuit

• How do you calculate a voltage drop? In a parallel and in a series?

• In a parallel the voltage is the same across each branch as it is across the battery

• In a series the voltage is divided amoung resistors

• V=I*R

• What is the current across the circuit?

• What is the current across each branch?

• What is the total current?

• What is the total resistance?

• How are magnetic fields created in a wire?

• When electricity flows through the wire magnetic fields are created

• What needs to be done to create electricity?• What are the three requirements

• Go Green Tigers!

• A 120 volt charger has 100 turns with the secondary coil has 20 turns. What is the output voltage?

• Green tigers!

• http://www.sunnyportal.com/Templates/PublicPage.aspx?page=9f6e421c-cbe9-4fd9-ab89-9481cdd34bf1

2/28

• Why is the generator harder to turn when the bulb is lit?

• Create a picture of 3 bulbs in series. • Create a picture of 3 bulbs in parallel.

• Monday – benchmark assessment for electricity

Say the following circuit is hooked up to a 40 volt source.

What is the current going across each branch? What is the current across the battery? What is the voltage drop across each battery?What is the current across the battery in the picture above?

a. 12 V higher b. 12 V lowerc. exactly the samed. impossible to tell

The diagram shows a light bulb connected by wires to the + and – terminals of a battery. Comparing the electric potentials at points A and D we find that the electric potential at point A is _________compared to point D.

How does a battery work?

It is more practical to move the coil instead of moving the magnet, by rotating the coil in a stationary magnetic field. A machine that produces electric current by rotating a coil within a stationary magnetic field is called a generator. A generator is essentially the opposite of a motor, converting mechanical energy into electrical energy.

37.3 Generators and Alternating Current

a. When a current moves to the right, there is a force on the electrons, and the wire is tugged upward.

b. When a wire with no current is moved downward, the electrons in the wire experience a force, creating current.

37.4 Motor and Generator Comparison

3/3

• Create a schematic diagram of 2 bulbs in series with a 9 volt battery.

• What is the difference between electric potential and electric potential energy?

• Ammeter – device that measures current.

• Electric potential – volts energy per unit charge.

3/4

• How is the assessment going?

• What percentage of the questions do you think you are going to get correct?

• What is one area you are doing well on?

• What is one area that is giving you a hard time