Complete the missing parts of the diagram: direction of electron flow, magnet polarity, or direction of force on the conductor. a) N S b) C O S F

My computer uses 15 W, after three hours on a 20 V supply, how much charge in coulombs have I used? What is the current I draw?

A scientist just bought a very cool magnet, and would like to measure it’s strength. She takes a stripof copper with width 3.0cm, and a rectangular cross-section of 0.004m^2 and runs a current of 0.5Athrough it. She knows copper has a free charge density of 8.491× 10^28 m−3. She holds the magnetnear the strip, and measures a voltage across the sides of the strips, and her voltmeter reads 11.2 nV-what is the strength of her magnet?

how would you do part b? this is a non graded practice worksheet

Question 3 In a cathode ray tube, 3.5 x 10¹5 electrons strike the screen in 30 seconds. What current does this represent? A B C D 8.57 x 10-15 A 1.68 x 10-² A 1.87 x 10-5 A 5.60 x 10-4 A

Two conductor wires of linear charge density lambda, one of them of infinite length and the other of length a, are placed as indicated in the figure and are in the same plane. Determine the electrical repulsion force between both wires.   A. F= 2K2ln 3   B. F=0   C. F= K 2 ln 3   D. F= 2K  ln 2 /a   E. F= K  ln 3    F. F = k Q/a2   G. F= 2 K ln2

Hi, please also explain how you got the answer and also explain why that is the right answer. This is the right answer please explain. (B)