1Draw magnetic field lines around a straight section of wire carrying a current horizontally to the left.2In what direction are the magnetic field lines surrounding a straight wire carrying a current that is moving directly toward you?3a horseshoe magnet is held vertically with the north pole on the left and south pole on the righta wire passes between the poles, equidistant from them, and carries a current directly away from youin what direction is the force on the wire?4after you rub comb and silk, which one is positive? why?5.when an electroscope is charged, two leaves repel each other and remain at an anglewhat balances the electric force of the repulsion so that the leaves dont separate further?6when an electric cell is connected to a circuit, electrons flow away from the negative terminal in the circuitbut within the cell, electrons flow to the negative terminalExplain7can copper wire and aluminum wire of the same length have same R?
1I can't explain better than to tell you to just wrap your fingers around a conductor.your thumb naturally points in the direction that current would flow, and your fingers are naturally pointing in the direction that the flux flowsThat's been easy for me to remember2See answer to 13See answer to 14I'm guessing silk, because the comb will attract the silk, therefore the comb is more negatively charged5The mass of the upper leaf6 Got me on that oneI know, but don't know how to explain itIt has something to do with the charge of the electrons being depleted as current flows to the load, but I'm no chemist 7Yes, but you would have to drastically cool the aluminum to get the same conductivity as copper.
