A 4.00 A current runs through a 12-gauge copper wire (diameter 2.05 mm) and through a light bulb. Copper has 8.5 x 1028 free electrons per cubic meter.
Part A How many electrons pass through the light bulb each second? να ΑΣφ ? N= Request Answer Submit Part B What is the current density in the wire? V ΑΣφ ? A/m2 Request Answer Submit
Part C At what speed does a typical electron pass by any given point in the wire? Express your answer using two significant figures V ΑΣΦ ? -- m/s Va = Request Answe Submit ver Part D If you were to use wire of twice the diameter, which of the above answers would change? Would they increase or decrease? J would decrease and va would decrease, N would not change J would increase and va would increase, N would not change Nwould increase and va would increase, J would not change N would increase and va would decrease, J would not change J would increase and va would decrease, Nwould not change