Natural philosophy for general readers and young persons / translated and edited from Ganot's Cours élémentaire de physique (with the author's sanction) by E. Atkinson.

  • Atkinson, E. (Edmund), 1804-1887.
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Natural philosophy for general readers and young persons / translated and edited from Ganot's Cours élémentaire de physique (with the author's sanction) by E. Atkinson. Source: Wellcome Collection.

    583/618 (page 561)
    VIII.—FRICTIONAL ELECTRICITY. 1. How can you prove that whenever one khicl of electricity is pro- duced the other is produced at the same time and in the same quantity ? 2. What kinds of electricity are produced on each of the following substances when they are rubbed together in pairs? Flannel and brass, glass and flannel, gun-cotton and shellac. 3. How do you prove that there are two kinds of electricity? 4. If you were given a stone, and you were unaware whether it were a conductor, explain how you would proceed to determine this point. 5. Why is repulsion a surer test of the electric condition of a body than attraction ? 6. Give some instances of the influence of moisture in electrical phenomena. 7. What is the best means of depriving a bad conductor of a charge of electricity ? 8. State the general laws of distribution of electricity in an electrified conductor. Describe the distribution in the case of a hollow in tube insulated and electrified. How is it modified if you approach your hand to one end ? 9. How can you prove that electricity only results on the surface of bodies? 10. By what experiment can you prove that a solid sphere of metal cannot be more highly electrified than a hollow shell of the same diameter ? 11. A body {A) is brought near a magnetic needle, which is thereby seen to be acted upon. How could you prove whether this action is due to electricity or to magnetism ? 12. In what respect do the forces of magnetism and electricity resemble each other ? In what do they differ ? , 13. Explain the statement that electricity only attracts electrified bodies. 14. An egg-shell is placed upon a table, and a stick of sealing-wa.x rubbed with flazinel is brought near it. As the sealing-wa.x is moved the egg follows it. Give a full explanation of these results. 15. Sulphur is ground in a porcelain mortar, and some of the powder is placed on the cap of a gold-leaf electroscope ; the leaves divei'ge : why? The powder is removed by just tilting the electroscope. What haiipens to the leaves ? O O