C17WebLab1(2)

C17WebLab1(2) - Make sure you observe what happens when one...

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Chapter 17 WebLab#1 “Electrostatic Force” * Go to the following website: http://www.explorelearning.com/index.cfm? * Click on the three boxes on the right to view the geometric dimensions of the apparatus, the angle that the strings make with the vertical, and the force vectors and magnitudes. * Set the mass of the charges to 100 grams with the appropriate slider. * Increase charge q 1 by moving the slider to the right. Observe how the system responds. Note that what you see occurs at equilibrium; it would take a while for the system to end up that way. Note the magnitude and directions of the various forces. * Change the sign of charge q 1 by moving the slider to the left. Observe how the system responds. Note the magnitude and directions of the various forces. * Similarly modify charge q 2 .
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Unformatted text preview: Make sure you observe what happens when one charge is positive and the other negative, when both charges are positive, and when both charges are negative. Note the magnitude and directions of the various forces. * Set both charges to 20 x 10-6 C. Adjust the length of the strings so that R , the distance between the charges, is varied. Note the magnitude and directions of the various forces. Questions: 1) What is the direction of the force on a charge when both charges have the same sign? How do you know? 2) What is the direction of the force on a charge when the charges have different signs? How do you know? 3) How can you increase the magnitude of the force between two charges? a) Method #1 How do you know? b) Method #2 How do you know? 4) Explain how this apparatus can be used to determine the magnitude and sign of an unknown charge....
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