Never Lose Track of Time

Overview

Objectives/Goals How does the construction of a magnetic clock affect its efficiency in comparison to a battery operated clock? Methods/Materials I used a mechanical pendulum clock, 2 bar magnets, 1 cylindrical antioc magnet, one battery-operated clock with used batteries, and a timer. A. 1. First, I must construct a magnetic clock 2. I start by using a mechanical pendulum clock as a basic foundation of the magnetic clock 3. After this, I attached the antioc magnet to the pendulum, and I placed 2 bar magnets with equal force and same size on either side of the pendulum. 4. I then adjusted the positions of the magnets to provide the most efficient pendulum movements due to the repulsion theory B. 5. I now have my construction ready; therefore I proceed to the actual comparison part. 6. I begin with taking out the battery-operated clock and inserting old batteries (for the reason of testing faster) 7. I then synchronize both the pendulum clock and the battery- operated clock 8. I have 3 trials, all out of a time period of 5 minutes 9. I time how long it takes each clock to come to a complete halt 10. I write down my results, and compare both clocks# efficiencies Results From my experiment, out of a total 5 minutes, my magnetic clock worked approximately one minute every trial. Each consecutive oscillation of the pendulum took longer. I discovered that during the first, second, and third trial the pendulum#s first oscillation took approximately 1 second. Later the pendulum oscillations took longer. Conclusions/Discussion A battery- operated clock is more efficient than a magnetic clock. The results refute my hypothesis, because the battery- operated clock worked 5 minutes out of 5 minutes, in contrast the magnetic clock worked for approximately 1 minute. Some reasons for the ceasing of the clock's progression could be the force of gravity, insufficient power by the magnets, or wrong positioning of the magnets. Therefore, the

Competition history

• CSEF 2007 Electronics & Electromagnetics · Entry J0829

Resources

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