Question

In Explorations 1 and 2, we have been focusing on the direction of the force on a current- carrying wire. It is obtained by using a right hand rule. Make sure you understand the right hand rule and how to use it to determine the direction of the force on a current- carrying wire when the direction of the magnetic field and the current are known. The magnitude of the force on a current-carrying wire is given by F = ILBsino where I is the amount of current through the wire, L is the length of the wire, B is the magnitude of the magnetic field and is the angle between the magnetic field and the direction of the current. In the Investigations below, we will quantitatively explore the magnitude of the force on a current-carrying wire and explore its dependence on 1, L and e. Equipment: 1 current-carrying wire set-up 1 power supply 1 ammeter Investigation 1: Relationship between force and current in a current-carrying wire In this section we will explore the relationship between the force on a current-carrying wire and the current through the wire. Investigation 1.1 Set up the main unit as in Exploration 2: Mount the main unit on the lab stand, place one of the current loops into the end of the main unit, with the foil extending down into the magnet assembly and position the lab stand with the Current Loop down between the poles of the magnet. The Current Loop should not be touching the magnet. 116

Answer 1

(9) proportional to current Here the force is loop. Hence flowing through the Hence mathematically we can say Fx I If we on the linear graph we cowe مو زیبا be were to plot the force vs. cworent paper can predict the shape of the straight line passing through origin 2 Since here و لا have corre F = ILB Hence the slope of the that is the length of the wire times F will be - LB I magnetic field. com determine the magnetude of the Yes de from the data. If we devide the slope corrent with the length of the wire magnetude of the magnetic field magnetic field of the force will get the VS. curve we

(61 Here we have taken I meter Current (Amp) Force (Newton) 0.5 1:00Z 1 4.Ol 1.5 6.009 2 8.018 2.5 10.019 3 10.025

(C) Here in the plot the force depends on current linearly Here cowe we have The slope of the curve after fitting the 4-2942 is

current | (Amp) 10 13 16 1 4 7 0.5 0 O 1.2 force F (Newton) ♡ O 3.3

(d ) Here have the we clove slope of the 4.29 42 Now we know the slope of the curwe LB Taken L = 1 meter Hence, B = 4.2942 - 4.2942 Tesla 1