Current Electricity Test - 5

According to the first Kirchhoff’s rule, the total current flowing into a junction is same as the total current flowing out of the junction.

Option A is the correct option. According to the second Kirchhoff’s rule the sum of change in potential around any closed loop in a circuit involving resistors and cell is equal to zero.

According to the Kirchhoff’s first rule, the total current flowing into a junction is same as the total current flowing out of the junction i.e. at any point in an electric circuit the total charge entering a junction per unit time (current) is same as the total charge leaving the junction. So, Kirchhoff’s current law is a consequence of conservation of charge.

A dielectric is a substance that is a poor conductor of electricity.

A dielectric material is defined as the material whose dominant charges in the molecule are bound negative and positive charges that are held in place by atomic and molecular forces.

In an external electric field, the positive and negative charge of the non-polar molecule is displaced in the opposite direction. The displacement stops when the external force on the constituent charges of the molecule is balanced by the restoring force

Thus, the non-polar molecule is placed in the external electric field to develop an Induced dipole moment.

The extent of the potential energy of dielectric, when placed in an external field, depends on the factors below:

1) The potential energy of the dipole in the external electric field to align the dipole with the field

2) The thermal energy is tending to disrupt the alignment of the dipole.

3) Induced dipole moment