2. Do Now (Homework due right now) How much current does a 30 ohm resistor draw over 90V?

3. Yesterday we learned Ohm’s law
Be careful with Ohm’s law and Power equations
Both deal with the exact same variables but arranged in opposite ways

4. Lots of problems require you to combine the two
We saw some examples yesterday. Let’s master them today
There will be a 10 question long quiz at the end of class based on this

5. What is the resistance of a 40W bulb that uses 2A of current?

6. Find the current through a 29ohm resistive circuit when 18 volts is applied

7. Find the resistance of a circuit that draws 0. 05A with 1
Find the resistance of a circuit that draws 0.05A with 1.8 volts applied

8. Find the applied voltage of a circuit that draws 2A through a 2000-ohm resistance

9. If a blender is plugged into a 110V outlet that supplies 3A of current, what amount of power is used by the blender?

10. If a clock expends 4W of power from a 9V battery, what about of resistance is running through the clock?

11. Challenge question A calculator uses 3W of power and has a resistance of 4 ohms. What is the voltage applied to the calculator?

12. Challenge The electric bill rate for a household is 9cents/kW used
Challenge The electric bill rate for a household is 9cents/kW used. If the house wiring has a rating of 110V and they use a average of 0.005A, how much did they pay for their electric bill at the end of the year?

13. The electric bill rate for a household is 9cents/kW used
The electric bill rate for a household is 9cents/kW used. If the house wiring has a rating of 110V and they use a average of 0.005A, how much did they pay for their electric bill at the end of the year?

14. Tommy’s juicer uses 100W when 9A is supplied to it
Tommy’s juicer uses 100W when 9A is supplied to it. How many ohms does the juicer supply?

15. Amanda’s hair dryer requires 11A of current from a 110V outlet
Amanda’s hair dryer requires 11A of current from a 110V outlet. How much power does it use?

16. Challenge The electric bill rate for a household is 9cents/kW used
Challenge The electric bill rate for a household is 9cents/kW used. If the house wiring has a rating of 110V and they use a average of 0.005A, how much did they pay for their electric bill at the end of the year?

17. Exit ticket time!!!