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Includes
Instruction Manual and
Teacher's Notes
and
Experiment Guide for
Typical
Experiment Results
the PASCO scientific
Model SE-9638
®
e/m APPARATUS
10101 Foothills Blvd. • Roseville, CA 95678-9011 USA
Phone (916) 786-3800 • FAX (916) 786-8905 • web: www.pasco.com
012-03471E
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Table of Contents
Related Manuals for PASCO SE-9638
Summary of Contents for PASCO SE-9638
- Page 1 012-03471E Teacher’s Notes Experiment Guide for Typical Experiment Results the PASCO scientific Model SE-9638 e/m APPARATUS better ® 10101 Foothills Blvd. • Roseville, CA 95678-9011 USA ways to Phone (916) 786-3800 • FAX (916) 786-8905 • web: www.pasco.com teach science...
- Page 2 e/m Apparatus 012-03471E Discard This Page ®...
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Page 3: Table Of Contents
012-03471D e/m Apparatus Table of Contents Section Page Copyright, Warranty, and Equipment Return ........... ii Introduction ...................... 1 Equipment ......................1 Operation Measuring e/m ..................2 Analysis of e/m Measurement .............. 3 Deflections of Electrons in an Electric Field ........4 Two Simple Demonstrations .............. - Page 4 PASCO scientific. year from the date of shipment to the customer. PASCO Equipment Return Should this product have to be returned to PASCO scientific,...
- Page 5 Type of Computer (Make, Model, Speed). To Reach PASCO Type of external Cables/Peripherals. • If your problem is with the PASCO apparatus, note: For Technical Support call us at 1-800-772-8700 (toll- free within the U.S.) or (916) 786-3800. Title and Model number (usually listed on the label).
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Page 6: Introduction
012-03471E e/m Apparatus Introduction The PASCO Model SE-9638 e/m Apparatus provides a simple method for measuring e/m, the charge to mass ratio Helmholtz coils of the electron. The method is similar to that used by J.J. Thomson in 1897. A beam of electrons is accelerated... -
Page 7: Operation
Ammeter with 0-2 A range to measure current in without parallax error. Helmholtz coils (such as the PASCO Model SB- 9624 Multimeter) Additional Equipment Needed— Voltmeter with 0-300 V range to measure accelerat-... -
Page 8: Analysis Of E/M Measurement
012-03471E e/m Apparatus Toggle Switch: Current adjust knob Up for e/m experiment, for Helmholtz coils Down when using deflection plates. Focus knob Upper Lower Ammeter Voltmeter Power Supply (0-2 A) (0-300 (Heater VDC) 6.3 VDC or VAC) Power Supply (Helmholtz Coils 6-9 VDC, Power Supply ripple <... -
Page 9: Deflections Of Electrons In An Electric Field
e/m Apparatus 012-03471E 2. Apply the 6.3 (VDC or VAC), or voltage noted on tube, where: to the HEATER and 150-300 VDC to the ELEC- V = the accelerating potential TRODES of the ELECTRON GUN (the accelerating a = the radius of the Helmholtz coils potential). -
Page 10: Diagram Of Connections
Lower Deflection e/m Tube Plates pin 11 pin 10 Anode pin 6 Grid Cathode Focus Adjust pin 2 Variable 150-300 VDC Heater Resistor pin 1 pin 12 Heater Voltage Power Supply Diagram of Connections for the SE-9638 e/m Apparatus ®... -
Page 11: Improving Experimental Results
e/m Apparatus 012-03471E Improving Experimental Results Measurement of e/m Notes 1) The greatest source of error in this experiment is the velocity of the electrons. First, the non-uniformity of the accelerating field caused by the hole in the anode causes the velocity of the electrons to be slightly less than their theoretical value.
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