3 Fig. 3.1 shows a metal sphere on an insulating support. Fig. 3.1 A student has available two rods, one charged positively and one charged negatively. Using one of these rods, she gives the sphere a uniform negative charge by induction. State which rod she chooses, and describe the procedure she follows. [4] 2 A metal sphere, mounted on an insulating plastic stand, is positively charged. (a) State the name of the unit in which electric charge is measured. (b) A smaller metal sphere, also mounted on an insulating plastic stand, is uncharged. This smaller sphere is moved close to the positively charged sphere. Fig. 2.1 shows the two spheres. positively charged sphere smaller sphere plastic stands Fig. 2.1 (i) On Fig. 2.1, draw the distribution of charge on the smaller sphere. (ii) An earthed metal wire is touched against the smaller metal sphere. State and explain what happens to the charge on the smaller sphere. (c) Explain, in terms of their structures, why the metal wire is an electrical conductor but the plastic stand is an electrical insulator. [1] [2] [2] [2]

Understanding Business
12th Edition
ISBN:9781259929434
Author:William Nickels
Publisher:William Nickels
Chapter1: Taking Risks And Making Profits Within The Dynamic Business Environment
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3 Fig. 3.1 shows a metal sphere on an insulating support.
Fig. 3.1
A student has available two rods, one charged positively and one charged negatively. Using one of
these rods, she gives the sphere a uniform negative charge by induction. State which rod she
chooses, and describe the procedure she follows.
[4]
Transcribed Image Text:3 Fig. 3.1 shows a metal sphere on an insulating support. Fig. 3.1 A student has available two rods, one charged positively and one charged negatively. Using one of these rods, she gives the sphere a uniform negative charge by induction. State which rod she chooses, and describe the procedure she follows. [4]
2 A metal sphere, mounted on an insulating plastic stand, is positively charged.
(a) State the name of the unit in which electric charge is measured.
(b) A smaller metal sphere, also mounted on an insulating plastic stand, is uncharged. This smaller
sphere is moved close to the positively charged sphere. Fig. 2.1 shows the two spheres.
positively
charged
sphere
smaller
sphere
plastic
stands
Fig. 2.1
(i) On Fig. 2.1, draw the distribution of charge on the smaller sphere.
(ii) An earthed metal wire is touched against the smaller metal sphere. State and explain what
happens to the charge on the smaller sphere.
(c) Explain, in terms of their structures, why the metal wire is an electrical conductor but the plastic
stand is an electrical insulator.
[1]
[2]
[2]
[2]
Transcribed Image Text:2 A metal sphere, mounted on an insulating plastic stand, is positively charged. (a) State the name of the unit in which electric charge is measured. (b) A smaller metal sphere, also mounted on an insulating plastic stand, is uncharged. This smaller sphere is moved close to the positively charged sphere. Fig. 2.1 shows the two spheres. positively charged sphere smaller sphere plastic stands Fig. 2.1 (i) On Fig. 2.1, draw the distribution of charge on the smaller sphere. (ii) An earthed metal wire is touched against the smaller metal sphere. State and explain what happens to the charge on the smaller sphere. (c) Explain, in terms of their structures, why the metal wire is an electrical conductor but the plastic stand is an electrical insulator. [1] [2] [2] [2]
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