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- In a circuit consisting of a 9 V battery, about 20 cm of 12-gauge copper wire, and a 60 W light bulb, which of the following correctly describes the motion of charge in the wire? a. The protons move from their initial position in the wire away from the negative terminal of the battery toward the positive terminal of the battery. It would take a proton a short time to travel between the terminals - only a few microseconds. b. The protons are generated in the battery and then move away from the positive terminal of the battery toward the negative terminal of the battery. It would take a proton a long time to travel between the terminals - at least an hour. c. The free electrons move from their initial position in the wire away from the negative terminal of the battery toward the positive terminal of the battery. It would take a free electron a long time to travel between the terminals - at least an hour.The electric field inside a 70-cm "-long" copper wire is 0.020 V/m. What is the potential difference between the ends of the wire?The capacitance of a parallel-plate capacitor is proportional to the area of its plates and inversely proportional to the plate separation. O True O False The drift speed of electrons in a copper wire carrying 10 A current is much greater than 1 m/sec. O True O False The electric power dissipated in a resistor is eventually converted to kinetic energy of charges. O True O False
- A100-W lightbulb is connected to a household circuit (E=120 V). How many electrons pass through the lightbulb in 1 minute?You have a battery marked "6.00 V." When you draw a current of 0.387 Afrom it, the potential difference between its terminals is 5.25 V. What is the potential difference Δ? when you draw 0.583 A?Take a look at the four conductivity materials listed. Which of the following statements regarding the current density J₁ in material n is TRUE when subjected to the same electric field? A. JD > JC > JA > JB B. JA JB > JC > JD C. JB > JA> Jc > JD D. JD > Jc > JB > JA Material A B с D Conductivity (2 m) 2.44 × 108 1.47 × 108 3.25 × 108 5.5 × 108