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PartI-Van de Graff Generator Demonstration: In this part of the experiment, the TA will require a few student demonstrators to perform the activity below before the class answers the questions that follow. The student volunteer must stand on the rubber mat next to the Van de Graff generator and place your hand on top of the generator. Have another volunteer turn the generator on. While the generator is charging, shake your head. 1. What do you observe? 2. What do you feel? 3. Can you explain what occurs?Discharge the generator by touching the dome with the conducting sphere and place one of the small Styrofoam spheres on top of the dome. Turn the generator on and allow it to charge. Without touching the generator or the Styrofoam sphere, bring your hand close to the Styrofoam sphere. 4. What happens? 5. Explain why this happens. Place the conducting sphere in contact with the Van de Graff generator with your hand in contact with the conducting sphere. Turn the Van de Graff generator on and allow it to charge. Remove your hand from the conducting sphere and then turn the generator off. Bring the sphere close to some Styrofoam spheres or small pieces of paper and or other available light weight objects 6. What do you observe? What explanation can you give for this behavior? Discharge the generator using the discharge sphere. 7. 8. Place the conducting sphere close to the dome of the generator but not touching it and place your hand in contact with the opposite side of the conducting sphere. Turn the Van de Graff generator on and allow it to charge. Remove your hand from the sphere and then turn the generator off. Bring the sphere close to some Styrofoam spheres or small pieces of paper and any other available light weight objects 9. Were the results the same as when the conducting sphere was in contact with the generator? 10. Why or why not? What charge (+ve or-ve) was induced on the pieces of paper in this case, explain?Tear two pieces of scotch tape about 20cm in length. For ease in handling, fold each end over about 1cm to form handles on both pieces of tape, i.e. short portions of tape on each end which are no longer sticky A. Press both pieces of tape onto the tabletop so that they stick firmly. Peel off one of the pieces of tape, while your partner peels off the other. Bring the tip of the non-sticky side of your tape slowly near your partners, and carefully observe any interaction between the two pieces of tape.1. Describe the interaction between the two pieces of tape. Write all your answers in complete and legible sentences. 2. How does the distance between the tapes affect the interaction between them? Explain the reasoning for your answer Press two tapes with handles onto the tables as before and label them B for bottom. Press another tape with handles on top of each of the B tapes. Label these T for top. Pull each of the pairs of tapes off the table and then separate the top from the bottom. B. Questions: Describe the interaction between the tips of the two top tapes when they are brought slowly together. 1. Describe the interaction between the tips of the two bottom tapes when they are brought slowly together. 2. Describe the interaction between the tips of a top and a bottom tape when they are brought slowly together. 3. How does the interaction of the tapes compare to the electrical interaction you saw demonstrated earlier with the Van der Graff in part 1? Describe any similarities or differences 4.You are given three rods (acrylic, glass and PVC), three rubbing cloths (wool, silk and fur) and two insulated stands. Mount two of the threes rods on the insulated stands and suspend the third from a string A. With the wool cloth, vigorously rub one end of each rod. Without touching the rods, bring the rubbed end of the hanging rod close to those mounted on the stand. 1. What happens? 2. Why? Repeat part A with the silk cloth B. C. Repeai ppari A with the: fuur cloih

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1: As move your hand over the surface of a charged generator you will see little sparks of light zip over the surface between your hand making small cracking noise.

2: You will feel tinges of being exposed to electric charge and feel small zipping shocks in your hand as the surface discharges through you.

3: All this happens because when you put your hand over the surface of a charged van de Graff generator it discharges through your hand to the ground And as you move your hand over the surface the static charges lying on the surface try to clutch your hand to discharge to the ground.

4: If you use the Styrofoam sphere then the magnitude of shock experienced by you will increase, since the Styrofoam spheres are highly conducting.

Note :Since you have not mentioned which particular questions are to be answered, In Accordance with the HOMEWORKLIB POLICY if you ask more than one question in the single picture then only the first one will be answered or The first four subparts will be answered  

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