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# Lab 1 - Matt Karam PHYS 214 10 I've Got the Power 1 Goals...

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Matt Karam PHYS 214- 10 January 29, 2008 I’ve Got the Power! 1. Goals: This experiment provides a gateway to explore the basic concepts of magnetic and electric fields. By using different experiments we will observe the forces caused by magnets and electricity through charge dispersion. 2. Theory: The magnitude of the force of charge on particles F=(1/4piE 0 )(q 1 q 2 /r 2 )(r/r) E=(1/4piE 0 )(q 1 /r 2 )(r/r) (I) Magnetic Fields A. Procedure 1. Place 2 bar magnets North to North 2. Sprinkle iron filings and observe field lines 3. Place magnets North to South 4. Sprinkle iron filing and observe field lines B. Results: The north to south field lines come together (see lab notes pg. 1). The north to north field lines push up against each other and away C. Problem 1: To find poles on an unlabeled bar magnet, remember that compasses point magnetic north. (II) Electrostatics A. Procedure 1. Rub glass rod with a piece of paper 2. Touch it to an uncharged pith ball and observe how it reacts 3. Charge the square of plastic by rubbing it with paper towel or fur and try to pick up some scraps of paper 4. Rub the plastic square against the top of the electroscope and observe the reaction 5. Move the square near the electroscope observe what happens. B. Results 1. At first the pith balls sticks to the charged glass rod then once it acquires the charge it then repels the rod.

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