ELECTROSTATICS 



When a difference of potential is produced between two con- 

 ductors separated by an insulating material, the material is sub- 

 jected to a stress and lines of dielectric flux pass through it. 



12. Induced Charges of Electricity. When a positively 

 charged body A, Fig. 4, is brought near to an insulated conductor 



- B 



FIG. 4. Induced charges. 



BC, a negative charge is induced on the nearer side B and an 

 equal positive charge on the farther side C. The explanation is 

 that the potential of the end B due to the charge on A is higher 



FIG. 5. Induced charges. 



than that of C, but, since BC is a conductor, as soon as there is a 

 difference of potential between two points on it, electricity flows 

 from the region of high potential at B to the region of low poten- 

 tial at C; thus a positive charge appears at C and an equal nega- 

 tive charge at B and these charges so distribute themselves over 



