1. Daily Sprint START 1. If a computer uses 3A of current and is supplied with 120V of voltage, then what is the total resistance of the computer? 2. A circuit uses 2A of current and has total resistance of 56Ω. How much voltage is the circuit supplied with?

2. MSA Prep You have two metal balls that are identical except one weighs twice as much as the other. If you drop both balls from the roof of the school at the same time, which statement is true? A.The heavy ball hits the ground first. B.The light ball hits the ground first. C.The heavy ball takes twice as long to hit the ground. D.Both balls hit the ground at the same time.

3. Ohm’s Law Quick Test Review Ohm’s Law Ohm’s Law Chart Ohm’s Law Practice This presentation is intended to be used with Activity 4.2.4 Ohm’s Law.

4. Resistors and Resistance Review

5. Resistance 1.What is resistance? The opposition to the flow of current

6. 2.Name the three type of resistors we have used, and explain their functions. –Fixed resistor: its resistance does not change –Photoresistor: its resistance changes depending on light intensity –Variable resistor: A person can change its value of resistance

7. 3.What happens to the brightness of an LED when the resistance in a circuit decreases? As the resistance in a circuit decreases, the brightness of the LED will increase.

8. Color Codes 1 st Band 1 st Digit 2 nd Band 2 nd Digit 3 rd Band Number of Zeros 4 th Band Tolerance Black 00 Brown 110 Red 2200 Orange 33000 Yellow 440,000 Green 5500,000 Blue 66000,000 Violet 77 Gray 88 White 99 Gold +/- 5% Silver +/- 10% 4. 5. 6. 7. 8.

9. Ohm’s Law Chart V IR Cover the quantity that is unknown. Solve for V V=IR

10. Ohm’s Law 9.What is the voltage of a circuit that has a total resistance of 14Ω and total current of 3A? 10.An electrical circuit is powered by a voltage of 110v and has total current of 5A. What is the total resistance of the circuit?

11. Using the Law 11.If a game system has a total resistance of 40Ω and is supplied with 120v of voltage, then what is the total resistance of the computer? 12.A circuit uses 0.5A of current and uses 9v of voltage. How much voltage is the circuit supplied with?

12. Study for the Test!!