Question

About Electricity chapter​

Answer 1

Answer:

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1.Positive and negative charges: The charge acquired by a glass rod when rubbed with silk is

called positive charge and the charge acquired by an ebonite rod when rubbed with wool is called negative charge.

2. Coulomb: It is the S.I. unit of charge. One coulomb is defined as that amount of charge which repels an equal and similar charge with a force of 9 x 109 N when placed in vacuum at a distance of 1 meter from it.

Charge on an electron = -1.6 x 10-19 coulomb.

3. Static and current electricities: Static electricity deals with the electric charges at rest while the current electricity deals with the electric charges in motion.

4. Conductor: A substance which allows passage of electric charges through it easily is called a

‗conductor‘. A conductor offers very low resistance to the flow of current. For example copper,silver, aluminium etc.

5. Insulator: A substance that has infinitely high resistance does not allow electric current to flow through it. It is called an ‗insulator‘. For example rubber, glass, plastic, ebonite etc.

6. Electric current: The flow of electric charges across a cross-section of a conductor constitutes an electric current. It is defined as the rate of flow of the electric charge through any section of a conductor. Electric currentharge/Time or I = Q/t Electric current is a scalar quantity.

Answer 2

Electricity chapter is chapter 3 of class 12 physics

Explanation:

1. In this chapter we study about resistivity, conductivity of conductors and how these vary with change in temperature
2. We also study the circuit having different combination like series, parallel etc
3. In this chapter we study about the Kirchhoff's laws used to solve the circuit and also states the conservation of electric charge and electric potential
4. This chapter also deals with the impact on charge carriers in any conductor in the presence of electric field
5. We also study about the Ohm's law in vector form
6. Heating effect is also stated in this chapter and we can calculate the amount of heat or power consumed by any circuit

To know more about this chapter, visit :

Define resistivity and conductivity. State their units.

https://brainly.in/question/8284430

Defined Kirchhoff's law?

https://brainly.in/question/1090815