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2: Magnetic Force on a Rectangular Coil as a Function of the Length (L): Current (A) 4.0 Length of the wire (meter) 0.02 0.04 0.06 0.08 Δm (Kg) 0.006 0.013 0.019 0.024 Force (N)

2: Magnetic Force on a Rectangular Coil as a Function of the Length (L): Current (A) 4.0 Length of the wire (meter) 0.02 0.04 0.06 0.08 Δm (Kg) 0.006 0.013 0.019 0.024 Force (N)

College Physics
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter22: Magnetism
Section: Chapter Questions
Problem 39PE: (a) What is the angle between a wire carrying an 8.00-A current and the 1.20-T field it is in if...
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I am working on a handout for physics homework and I am trying to fill in the table on the second image.  I know that I need to used F = ILB, but I am not sure of how to obtain B in order to fill in the table.  Help will be greatly appreciated, thank you!

1: Magnetic Force on a Rectangular Coil Introduction A current-carrying wire in a magnetic field experiences a force that is usually referred to as a magnetic force. The magnitude and direction of this force depend on four variables: the magnitude of the current (I); the length of the wire (L); the strength of the magnetic field (B); and the angle (0) between the wire and the magnetic field. This magnetic force can be described mathematically by the vector cross product: F = ILXB, or in scalar terms (6.1) Fm ILB sin 0 In this part of the lab, we are going to investigate how the force is dependent on these variables. A rectangular wire loop is connected across a power supply with an emf of 16 V. The wire loop is then used in an experiment to measure the strength of the magnetic field between the poles of a magnet. The magnet is placed on a digital balance, and the wire loop is held fixed between the poles of the magnet, as shown. The 0.020 m long horizontal segment of the loop is midway between the poles and perpendicular to the direction of the magnetic field. The balance was adjusted to "ZERO" before turning ON the power supply. When the power supply in the loop is turned on, a 4.0 A current flows in the direction shown. N Ω S 0.020m Balance Figure not drawn to scale 1. The resistance of the wire according to Ohm's Law is: 4 2. The direction of the magnetic force on the wire segment in the magnetic field is Upwards/ Downwards (use Right Hand Rule)
Transcribed Image Text:1: Magnetic Force on a Rectangular Coil Introduction A current-carrying wire in a magnetic field experiences a force that is usually referred to as a magnetic force. The magnitude and direction of this force depend on four variables: the magnitude of the current (I); the length of the wire (L); the strength of the magnetic field (B); and the angle (0) between the wire and the magnetic field. This magnetic force can be described mathematically by the vector cross product: F = ILXB, or in scalar terms (6.1) Fm ILB sin 0 In this part of the lab, we are going to investigate how the force is dependent on these variables. A rectangular wire loop is connected across a power supply with an emf of 16 V. The wire loop is then used in an experiment to measure the strength of the magnetic field between the poles of a magnet. The magnet is placed on a digital balance, and the wire loop is held fixed between the poles of the magnet, as shown. The 0.020 m long horizontal segment of the loop is midway between the poles and perpendicular to the direction of the magnetic field. The balance was adjusted to "ZERO" before turning ON the power supply. When the power supply in the loop is turned on, a 4.0 A current flows in the direction shown. N Ω S 0.020m Balance Figure not drawn to scale 1. The resistance of the wire according to Ohm's Law is: 4 2. The direction of the magnetic force on the wire segment in the magnetic field is Upwards/ Downwards (use Right Hand Rule)
Various rectangular loops of wire with same total length (0.8m) were constructed such that the lengths of the horizontal segments of the wire loops varied between 0.02 m and 0.10 m. The horizontal segment of each loop was always centered between the poles, and the current in each loop was always 4.0 A. The force reading of the balance changed every time the length of the wire was changed and the power supply was turned on. The difference in reading is only due to the magnetic force on the wire: Fg = Fm → Amg = ILB sin 0 = (0 =90° sin 0 = 1) where Am = m - mo, mo= mass reading without any current = 0 ❖Simulation created by the Physics Education Technology Project (PhET) c/o The University of Colorado at Boulder http://phet.colorado.edu/ ILB, This lab has been modified for the On-line lab course from "Electricity and Magnetism", 3rd Ed. Sokoloff, Laws and Thornton for UNCC labs 1102L/2102L. Current (A) 2: Magnetic Force on a Rectangular Coil as a Function of the Length (L): 4.0 Length of the wire (meter) 0.02 0.04 0.06 0.08 Am (Kg) 0.006 0.013 0.019 (6.2) 0.024 Force (N)
Transcribed Image Text:Various rectangular loops of wire with same total length (0.8m) were constructed such that the lengths of the horizontal segments of the wire loops varied between 0.02 m and 0.10 m. The horizontal segment of each loop was always centered between the poles, and the current in each loop was always 4.0 A. The force reading of the balance changed every time the length of the wire was changed and the power supply was turned on. The difference in reading is only due to the magnetic force on the wire: Fg = Fm → Amg = ILB sin 0 = (0 =90° sin 0 = 1) where Am = m - mo, mo= mass reading without any current = 0 ❖Simulation created by the Physics Education Technology Project (PhET) c/o The University of Colorado at Boulder http://phet.colorado.edu/ ILB, This lab has been modified for the On-line lab course from "Electricity and Magnetism", 3rd Ed. Sokoloff, Laws and Thornton for UNCC labs 1102L/2102L. Current (A) 2: Magnetic Force on a Rectangular Coil as a Function of the Length (L): 4.0 Length of the wire (meter) 0.02 0.04 0.06 0.08 Am (Kg) 0.006 0.013 0.019 (6.2) 0.024 Force (N)
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