Lab 8
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Lab8_phy2_report.docxTA: Keslo Estil SEC#: Name:
Lab 8. Magnetic Field of a Solenoid
A solenoid is made by taking a tube and wrapping it with many turns of wire. A metal Slinky is the same shape and will serve as our solenoid. When a current pass through the wire, a magnetic field is present inside the solenoid. Solenoids are used in electronic circuits or as electromagnets.
In this lab we will explore factors that affect the magnetic field inside the solenoid and study how the field varies in different parts of the solenoid. By inserting a Magnetic Field Sensor between the coils of the Slinky, you can measure the magnetic field inside the coil. You will also measure 0, the permeability constant. The permeability constant is a fundamental constant of physics.
Objectives
· Determine the relationship between magnetic field and the current in a solenoid.
· Determine the relationship between magnetic field and the number of turns per meter in a solenoid.
· Study how the field varies inside and outside a solenoid.
· Determine the value of the permeability constant.
Analysis (1-10)
Note: Show all equations, calculations and very clear screenshots for the graphs with fits to receive full credit, and do not write them in the data tables.
Data Tables
Part I
|
Current in solenoid I (A) |
Magnetic field B (mT) |
|
0.5 |
|
|
1.0 |
|
|
1.5 |
|
|
2.0 |
|
|
Length of Solenoid (m) |
7 |
|
Number of Turns |
92 |
|
Turns/meter () |
|
Part II
|
Current in solenoid I (A) |
Length of Solenoid (m) |
Turns/meter () |
Magnetic field B (mT) |
|
1.5 |
0.5 |
|
|
|
1.5 |
1.0 |
|
|
|
1.5 |
1.5 |
|
|
|
1.5 |
2.0 |
|
|
|
Number of Turns in Slinky |
92 |
45
Lab 8. Magnetic Field of a Solenoid A solenoid is made by taking a tube and wrapping it with many turns of wire. A metal Slinky� is the same shape and will serve as our solenoid. When a current passes through the wire, a magnetic field is present inside the solenoid. Solenoids are used in electronic circuits or as electromagnets.
In this lab we will explore factors that affect the magnetic field inside the solenoid and study how the field varies in different parts of the solenoid. By inserting a Magnetic Field Sensor between the coils of the Slinky, you can measure the magnetic field inside the coil. You will also measure P0, the permeability constant. The permeability constant is a fundamental constant of physics.
OBJECTIVES x Determine the relationship between magnetic field and the current in a solenoid. x Determine the relationship between magnetic field and the number of turns per meter in a
solenoid. x Study how the field varies inside and outside a solenoid. x Determine the value of the permeability constant.
Figure 1
MATERIALS computer meter stick Labquest Mini DC power supply Logger Pro high current probe Magnetic field sensor cardboard spacers Slinky£ connecting wires Graphical Analysis or graph paper switch
tape and cardboard
INITIAL SETUP 1. Connect the magnetic field sensor to the Labquest unit. Set the switch on the sensor to High.
