Explain the differences between insulators, and conductors. How can a charged bo

Question

Explain the differences between insulators, and conductors. How can a charged body be attracted to an uncharged body? Explain polarization and induction? The figure below small charges A, B, P in a line The charge at A is positive, that at B shows three negative, and that at P is positive. The values are those shown. Calculate the force on the charge at P due to A and B. At what point x on the line AB could there be no force P due to a and B, P were placed there? In the figure below, two small equal charges 2 x 10^-8 C are placed at A and B, one positive other negative. AB is 6cm. Find the force on a charge +1 x 10^-8 C placed at P, where P is 4 from the line AB along the perpendicular bisector XP The work per coulomb between two points A and B which is the work an external ag to carry a unit positive charge from B to A is the potential difference V_AB = kQ (1/a -1/b) on point charges 12 and 8 micro coulomb respectively are 10 cm apart find the work in b n closer.

Explanation / Answer

(1)

Free electrons are required the atoms or molecules of a substance to pass the cirrent through it. If no free electrons are presented in the atoms of the substance, then no current flows through the substance if applied large amount of voltages.

The substances which are allow the current flow through them are called conductors, otherwise the substances are insulators.

(2)

By the inducton, a charged object induces opposite sign of charge on a an uncharged object. So, the objects with opposite sign of charge will be attracted.

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