Magnetic propulsion T B L We can use a current passing through an object immersed in a magnetic field to produce motion. As shown in the picture above, there is a conducting bar (in blue) that can move without friction on a pair of conducting rails. The rails are joined at the left by a battery, and a switch that is initially open. The bar is initially at rest. The bar has a resistance - we will assume the resistance of all other parts of the circuit is negligible. The whole apparatus is in a uniform magnetic field, directed into the page. Both the rails and the magnetic field extend far to the left and right. In your answers, use signs to indicate the directions. For currents, if the current is counterclockwise, use a positive sign. If a current is clockwise, use a negative sign. For a force or velocity, if it is directed to the right use a positive sign. If a force or velocity is to the left, use a negative sign. K 7 Open in Reading Vie := Part (a) Homework Answered Due Mar 19th, 12:15 PM Use these numbers: the length of the bar is 30.0 cm; the battery voltage is 6.00 V; the resistance of the bar is 6.00 Q2, and the strength of the magnetic field is B = 0.500 T. Determine the magnitude and direction of the net force on the bar immediately after the switch is closed. N Type your numeric answer and submit 0.15 Answered - Correct! 4 attempts left You are correct Resubmit Part (b) Homework Unanswered Due Mar 19th, 12:15 PM Use these numbers: the length of the bar is 30.0 cm; the battery voltage is 6.00 V; the resistance of the bar is 6.00 Q2, and the strength of the magnetic field is B = 0.500 T. Determine the magnitude and direction of the net current in the circuit a long time after the switch is closed. By "a long time," we mean that enough time has passed for the bar to reach a terminal (constant) velocity. A Type your numeric answer and submit Open in Re Part (c) [:= Homework Unanswered Due Mar 19th, 12:15 PM Continuing from above, determine the velocity of the bar a long time after the switch is closed. m/s Type your numeric answer and submit Unanswered 5 attempts left Submit