# Static electricity prac

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Education

Published on March 16, 2014

Author: msali_aphs

Source: slideshare.net

Y E A R 8 – F O R C E S STATIC ELECTRICITY

AIM • To investigate static electricity.

EQUIPMENT • balloon • perspex rod • ebonite rod • silk cloth • flannel (or wool) cloth • small pieces of paper

RISK ASSESSMENT Risk Injury Prevention Fill out a risk assessment for your experiment

METHOD Part A: Rubbing a balloon 1. Blow into a balloon and tie off the end when it is inflated with air. 2. Rub the balloon on your clothes. It will acquire a small electric charge. Does it want to stick to them? Does the balloon tend to stick onto the wall? Write your results. 3. Rub the balloon over a friend’s hair. Does their hair tend to be attracted to the balloon? Does the balloon attract small pieces of paper? Write your results.

METHOD Part B: Rubbing perspex and silk, and ebonite and flannel 1. Move the perspex rod briskly against the silk cloth as if you are brushing the dust off it. 2. Place this near the pieces of paper and observe. 3. Charge the perspex rod again and place it near a stream of water from the tap. Observe what happens. 4. Repeat steps 1-3 with the ebonite rod and wool cloth.

RESULTS • Part A: • Part B: Scenario Observations Balloon rubbed against clothes Balloon rubbed against hair Object Observation with paper Observation with stream of water Perspex and silk Ebonite and wool

DISCUSSION 1. Why do the pieces of paper get attracted to the balloon and the rods? 2. Why does the stream of water attract or repel the rods? 3. Describe why the balloon and the rods need to be constantly charged.

CONCLUSION • Write your conclusion here.

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