Answer ALL these questions, Use the physics reference table from google if needed. Please explain and show work behind answers as much as possible.

Enter D G Name : Zixiang Lin Pr. Roster #: CO Take Home 1. Base your answer to the following question on the diagram below, which represents an electric circuit consisting of four resistors and a 12-volt battery. 12 V >6.00 236 0 > 180 What is the current measured by ammeter A? A) 4.0 A B) 0.50 A C) 72 A D) 2.0 A 2. A lamp has a current of 2.0 amperes at 6.0 volts. The 7. A 12-volt battery is connected to resistors Ri and Rz resistance of the lamp must be as shown in the diagram below. If the reading of A) 1.50 B) 6.09 C) 3.09 D) 120 voltmeter Vi is 8 volts, what is the reading of voltmeter V2? Base your answers to questions 3 and 4 on the diagram below. R. = 100 R2 60 Volt SR2 = 200 12 volts source A) 20. volts B) 12 volts C) 8 volts D) 4 volts 8. Which circuit segment has an equivalent resistance of 3. Compared to the current in Ri, the current in R2 is 6 ohms? A) less B) greater A) 30 24 20 C) the same 20 4. What is the total resistance of the circuit? A) 300 B) 6.60 C) 102 D) 20n C) an 20 5. A tungsten wire has resistance R at 20"C. A second 9. Electric current in a solid metal conductor is caused tungsten wire at 20"C has twice the length and half by the movement of the cross-sectional area of the first wire. In terms of R. A) both electrons and protons the resistance of the second wire is B) neutrons A) 2R B) 4R C) R D) ; C) protons, only 6. What is the smallest electric charge that can be put on D) electrons, only an object? A) 6.25 x 1018 C B) 9.11 x 10-31 C C) 1.60 x 10-19 C D) 9.00 x 109 C Version 2Pr. 10 In the circuit diagram below, what are the correct 14. A manufacturer recommends that the longer the readings of voltmeters Vi and 1? extension cord used with an electric drill, the thicker (heavier gauge) the extension cord should be. This recommendation is made because the resistance of a 6.0 V - 10.01 wire varies 5.00 A) inversely with length and directly with cross-sectional area B) directly with both length and cross-sectional A) Vi reads 4.0 V and 15 reads 2.0 V rea B) 'Vi reads 2.0 V and 12 reads 4.0 V C) inversely with both length and cross-sectional C) Vi reads 6.0 V and 12 reads 6.0 V area D) Vi reads 3.0 V and 1/2 reads 3.0 V D) directly with length and inversely with Base your answers to questions 11 and 12 on the cross-sectional area diagram below which shows 3 resistors connected to 15. In the diagrams below, / represents a unit length of a 15-volt source. copper wire and A represents a unit cross-sectional area. Which copper wire has the smallest resistance at room temperature? A) 5.0n 2A26 15-volt source R2 C 0.50 amp R3 20. 15n D) 20- 1 1. The total resistance of the circuit is A) 100 B) 2002 C) 303 D) 4052 16. Two electrons are separated by a distance of 3.00 x 12. If resistor R3 is removed and replaced by a resistor of 10-6 meter. What are the magnitude and direction of lower value, the resistance of the circuit will the electrostatic forces each exerts on the other? A) decrease B) increase A) 2.56 x 10-17N away from each other C) remain the same B) 2.56 x 10-17 N toward each other C) 7.67 x 10-23 N away from each other 13. An electrostatic force of magnitude Fexists between D) 7.67 x 10-23 N toward each other two metal spheres having identical charge q. The distance between their centers is r Which 17. What is the current in a circuit if 15 coulombs of combination of changes would produce no change in electric charge move past a given point in 3 seconds? the electrostatic force between the spheres? A) 12A B) 5A C) 45 A D) 18 A A) doubling q on one sphere while halving r 18. If the potential difference across a 30.-ohm resistor B) doubling q on both spheres while halving r is 10. volts, what is the current through the resistor? C) doubling q on one sphere while doubling r A) 0.25 A B) 0.33 A D) doubling q on both spheres while doubling r C) 3.0 A D) 0.50 A VersionMAG Pr. 25. Base your answer to the following question on the diagram below which represents an electric circuit. 3.0-voll The voltmeter, V, reads 12 volts. source Bon $3.0 0 19. In the circuit diagram above, what is the potential difference across the 3.0-ohm resistor? source 4 ohms $ 2 ohms A) 1.0 V B) 2.0 V C) 3.0 V D) 1.5 V (V ) 12 volts 20. Which voltage would cause a current of 0.5 ampere in a circuit that has a resistance of 24 ohms? The resistance of the circuit is A) 24 V B) 6.0 V C) 12 V D) 48 V A) less than 2? 21. Three ammeters are located near junction Pin a B) 20 direct current circuit as shown in the diagram below. C) between 20 and 6? D) 69 A3 26. To reduce the resistance of a metal conductor one should A) heat the conductor to a high temperature Bj cool the conductor to a low temperature A2 C) coat the conductor with an insulator D) wire the conductor in series with another resistor 27. Base your answer to the following question on the If ammeter Ar reads 3 amperes and ammeter Az reads diagram below which represents an electrical circuit. 4 amperes, then what does ammeter A3 read? A) 5A B) 7A C) 3A D) 8 A 22. A piece of wire has a resistance of 8 ohms. A second piece of wire of the same composition, diameter, and d.c. source 12 volts R2 5n temperature, but one-half as long as the first wire, has a resistance of A) 80 B) 292 C) 160 D) 48 The equivalent resistance of the circuit is 23. A potential drop of 50. volts is measured across a A) 5.09 B) 25 92 250-ohm resistor. What is the power developed in D) 6.09 the resistor? C) 0.170 A) 10. W B) 0.20 W C) 50. W D) 5.0 W 24. A uniform copper wire has a resistance of 100 ohms. If the wire is cut into 10 equal lengths, the resistance of each piece will be A) In B) 10 0 C) 100 0 D) 1,000 9 Version 2