Question

PHYSICS LAB MAGNETISM II: FORCE ON A CURRENT-CARRYING WIRE-8

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Equipment: 1 current-carrying wire set-up 1 power supply 1 ammeter Investigation 2: Relationship between force and length of a current-carrying wire In this section we will explore the relationship between the force on a current-carrying wire and the length of the wire. Investigation 2.1 Predict the dependence of the force on the length of the wire. If you were to plot the force vs. current on linear graph paper, what would you predict for the shape of the curve? What would be the slope of the curve? Could you determine the magnitude of the magnetic field from the data? How? b. Keep the current reading at maximum for this part of the experiment. Record the force and the length of the loop you used in the experiment you just did for the highest current reading. The lengths are given in the following table and the corresponding number is written on the loop. Current Loop SF 40 SF 37 SF 39 SF 38 SF 41 SF 42 Length 1.2cm 2.2cm 2cm 4.2cm 6.4cm 8.4cm Swing the arm of the Main Unit up to raise the present Current Loop out of the magnetic field gap. Carefully remove the Current Loop from the arm of the base unit. Do not pull from the bottom of the Current Loop unit but from the sides (near the nuts) so as to avoid breaking the loops. Replace the Current Loop with a new Current Loop, with a different length of wire. Carefully lower the arm into the center

Answer 1

- Bil I= 4.15A 1-10cm B - 5T F = 5x 4.15 10. 100 584.15 10 2.075N