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Here are some graphics for the ohm’s law lesson.

Here are some graphics for the ohm’s law lesson. Read through the book, work out the assigned problems, and come up with a lesson plan (written on paper) for this unit.

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Here are some graphics for the ohm’s law lesson.

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  1. Here are some graphics for the ohm’s law lesson. Read through the book, work out the assigned problems, and come up with a lesson plan (written on paper) for this unit. I have a box of resistors that you could pass around, and a setup where you can change resistance and voltage and watch a light bulb get dimmer or brighter. I will have already taught them about current (I = q/t)

  2. + - Symbols A Cell. + and -, Infinite current, R = 0, what’s really inside A Battery of cells A resistor A voltmeter, R = infinity V3 An ammeter, R = 0 A3

  3. + - A R • Ohm’s Law • V = Voltage (like pressure) • I = Current (like flow rate) A = ammeter – measures current V • R =V • I • R = Resistance in ohms () • V = Voltage in Volts (V) (pressure) • I = Current in Amps (A) (flowrate)

  4. + - A R • Ohm’s Law – re written for current • V = Voltage (like pressure) • I = Current (like flow rate) • R = Resistance to flow V • I =V • R • R = Resistance in ohms () • V = Voltage in Volts (V) (pressure) • I = Current in Amps (A) (flowrate)

  5. + - A Black 0 Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Gray 8 White 9 Gold 5% Silver 10% No color 20% R Ohm’s Law V • I =V • R • R = Resistance in ohms () • V = Voltage in Volts (V) (pressure) • I = Current in Amps (A) (flowrate) • They don’t need to know the color code • Demo - pass around resistors • (two properties - power and resistance) • Demo - power supply, resistor, light bulb • (show increase/decrease V, and R)

  6. Ohm’s Law + - A 120. mA 12.0 V • R =V • I • R = Resistance in ohms () • V = Voltage in Volts (V) (pressure) • I = Current in Amps (A) (flowrate) R= ?? Example 1:

  7. Ohm’s Law + - A 120. mA 12.0 V • R =V • I • R = Resistance in ohms () • V = Voltage in Volts (V) (pressure) • I = Current in Amps (A) (flowrate) R= ?? Example 1:

  8. Whiteboards – you need about 6 because they are so simple 1 | 2 | 3 | 4 | 5 | 6

  9. A light bulb has a resistance of 1200. Ω, and is hooked up to 240. volts. What current flows through it? • Given: • R = V • I • R = 1200 Ω • V = 240 V • I = ? • I = V/R = 240/1200 = 0.20 A = 200. mA 0.200 A of 200. mA

  10. question goes here • Given: • R = V • I • R = • V = • I = • Put your solution here answer goes here

  11. question goes here • Given: • R = V • I • R = • V = • I = • Put your solution here answer goes here

  12. question goes here • Given: • R = V • I • R = • V = • I = • Put your solution here answer goes here

  13. question goes here • Given: • R = V • I • R = • V = • I = • Put your solution here answer goes here

  14. question goes here • Given: • R = V • I • R = • V = • I = • Put your solution here answer goes here

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