Lab_Report_Magnetic_Induction

Lab_Report_Magnetic_Induction - 1st YEAR COMMON ENGINEERING...

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1 st YEAR COMMON ENGINEERING COURSE LAB REPORT MAGENETIC INDUCTION OF A CURRENT CARRYING LONG STRAIGHT WIRE Name: SHAFIQ SAMSUDIN Matric: 067437E03 Group: BL18 Date: 13.02.2007 1
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TABLE OF CONTENTS 1. Introduction Pg 3 2. Literature Review Pg 4 - 6 3. Experiment Setup Pg 7 - 9 4. Pg 10 - 11 5. References Pg 12 6. Log Sheet 1 - 4 Pg 13 - 14 2
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INTRODUCTION This experiment introduces the magnetic induction of a current carrying long straight wire. In this experiment, measurements on an apparatus with a long straight current-carrying wire will be used to determine the direction of the magnetic field, B . This experiment also measures the induced voltage in a small inductor coil placed near a long straight wire as a relative measurement of the magnetic field. This experiment confirms that the direction of the magnetic field near the wire is consistent with the right-hand rule that relates the current direction to the direction of the magnetic field. The experiment also demonstrates that the magnitude of the magnetic field surrounding a long straight wire decreases with increasing values of r, where r is the perpendicular distance from the wire. This experiment also determines the induced voltage in a small inductor coil as a function of the ac current in a long straight wire. In addition, the experiment helps us to calculate the induced voltage in a small inductor coil as a function of the frequency of the ac current in a long straight wire. The experiment’s equipment list includes a direct-current power supply, a sine- wave generator, a digital voltmeter, a digital ammeter, a 100-mH inductor coil, a small compass and a long straight wire apparatus. 3
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LITERATURE REVIEW In 1820 Hans Christian Oerstead noted that establishing a current in a long straight wire could deflect a nearby compass needle. This was a landmark experiment in the history of physics because it marked the first experimental connection between the sciences of electricity (the current in the wire) and magnetism (the deflection of the needle). The direction of the B field relative to the current direction is given by following the right-hand rule. If the thumb of the right hand points in the direction of the current, the four fingers of the right hand curl in the direction of the B field. This is shown clearly in Figure 6 of Datasheet 1, Log Sheet 1. If there is no current in the wire, all the magnets are aligned with the horizontal component of the earth’s magnetic field. When a strong current is present, the magnets point so as to
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Lab_Report_Magnetic_Induction - 1st YEAR COMMON ENGINEERING...

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