1. April 26 Physics

2. Homework #4

3. In: Label each diagram as series or parallel:

4. Objective: To understand Ohms law and measure: Simple Series Parallel circuits Success criteria: Calculate and measure current, voltage and resistance.

5. Amount of charge passing by every second: Current I=ΔQ Δt Measured in Amperes 1 Ampere= 1 Coulomb second

6. If a current of 80.0 mA exists in a metal wire, how much charge goes through in 10 minutes? How many electrons flow past a given cross section of the wire in 10.0 min? Sketch the direction of the current and the direction of the electrons motion.

7. Energy of each charge Electric potential V measured in Volts Energy charge

8. Resistance to flow of electrons Resistance Measured in Ohms Ω

9. How do you think the current would change if you increase the resistance in a circuit?

10. How do you think the current would change in a circuit if you increase the voltage into a circuit?

11. Ohms Law Georg Simon Ohm German physicist The relationship between current and voltage 1827

12. Ohms Law V=IR

13. A lightbulb has a resistance of 240 Ω when operating at a voltage of 120 V. What is the current in the bulb?

14. A toaster has a resistance of 10 kΩ. How much current flows through it at a voltage of 120V?

15. What is the resistance of a hair dryer if it runs at 120V with a current of 1 A?

16. What is the current of a lightning bolt that has a voltage of 10 million volts through air with a resistance of 2 KΩ?

17. Lab: Using a Multimeter Purpose: to measure circuits.

18. How to measure resistance voltage and current

19. Reading a Resistor

21. Out: A hairdryer takes 1 amp of current at 120 V. What is its resistance?