Bzc_physics 222 Lab Report_CL2

# Bzc_physics 222 Lab Report_CL2 - ZhichuanBan Physics 222...

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ZhichuanBan Physics 222 Lab Bing Li CL2 lab report 1. Question of the day: what do electric forces depend on and how? Electric forces depends on the magnitude of the charges and the distance between two charges. Larger the magnitude of the charges is and shorter the distance is, the forces is greater. 2. Activity 1: qualitative observations a. Set up: firstly, charge the rod by rubbing it with tissue paper. Then charge the ball by touching the ball with the charged rod. Charge another rod by just rubbing the flat end of the rod. Put the flat-end of the rod closer to the charged ball and observe. b. Observation: putting the charged rod closer to the charged ball, we can see the rod and the pith ball repel each other. That can indicate the ball is charged. When bringing the rod with the charged tip closer to the ball, the pith ball is repelled from the rod. And when rod moving closer to the ball, the angle becomes greater.

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