2. Which Resistor Has the Lowest Current? 40 0Hm Resistors in Parallel

Physics

Electricity Review

1. We have an outlet that can generate 1200W of power. We want to hook 12 holiday lights to it and make them as bright as possible. Should we hook them in series or in parallel? The brightness is directly proportional to the current flowing through the bulb. Equal

2. Which resistor has the lowest current? 40 0hm resistors in parallel

3. Which resistor has the highest power? 20 ohm

4. What arrangement of the resistors in the above diagram would give the most resistance? All in series

5. A battery provides 6V and 2A. We hook it up to a circuit. How long can it operate if it stores 3000J of energy? 250s

6. We have 2 motors that provide 100 ohms of resistance. We can hook them up to a 100V outlet. Which draws more power, series or parallel? parallel

7. Where would we put a motor so it can produce the most power? Where the current is greatest

8. Where should we add a resistor to dim the lights the most? skip

9. Where should we add a wire to bypass a resistor to increase current the most? 20 or the 40 not in parallel

10. Matching

Stores charge capacitor

Generates heat resistor

Provides push for electrons battery

Provides path for electrons wire

11. How much longer will a circuit operate with three 1.5V batteries in series compared to one battery alone? What about parallel? Series is 1/3 of one battery and parallel is 3X one battery alone

12. How much more power will we get if we put three 1.5V batteries in series compared to one battery when the resistance is .5 ohms? Nine times as much

13. What happens to power when we double resistance in a 12V circuit? halved

14. How many different circuits can we build from a 1, 2, and 3 ohm resistor if we have to use all three in all the circuits? 8

15. What is the electric field 3m from a 2C charge? 2X109 N/C

16. What happens to the force between two charges if we double the distance between them? 1/4

17. What happens to the force between two charges if we double both charges? quadruple

18. What happens to the force between two charges if we double one charge and double the distance between them? halved

19. How much energy does it take to move 10C of charge through a potential of 15V? 150J

20. Draw three things that can generate a magnetic field.