Solved Board Paper For CBSE Class 12

CBSE Sample Papers for Class 12 2019  is a highly interesting way to score well in examinations. This  CBSE Sample Paper Class 12 is very helpful for the students. Students need an easy way to understand and learn. Extramarks makes 12th Class Question Paper in such an easy language that students don’t have to struggle with the course of Class 12. Students can visit the website and review all content associated with CBSE Previous Year Question Papers Class 12. Extramarks provides the study material of all the chapters of the different subjects in the form of chapter wise content, CBSE Previous Year Question Papers Class 12, a different set of 12th Class Question Paper, free video lectures in order to help the students get a clear and a better understanding of all the core concepts.
Here are some topics in class 12:
 Introduction to Electric Charges and Fields

 Electric Charge

 Conductors and Insulators

 Charging by Induction

 Basic Properties of Electric Charge

 Coulomb’s Law

 Forces between Multiple Charges

 Electric Field

 Electric Field Lines

 Electric Flux

 Electric Dipole
Here is a brief summary of  Introduction to Electric Charges and Fields.
Atoms form the universe's building blocks. Everything you see around you can be separated into smaller and smaller sections before you finally reach a section where you can't further separate. That block of the building is what we call an Atom. Protons, electrons, and neutrons are present inside a molecule. Electrons and protons fit the definition of an electric charge from among the three. The protons are charged positive, the electrons are charged negative and the neutrons are neutral. Most of the atom's mass is condensed into a very small central region called the nucleus, and the electrons revolve around this large nucleus.

Similar to protons, this implies electrons are kept very loose. Hence from now on the flow of charges here will be reduced to the movement of electrons. As the atoms consist of protons and electrons, we can safely conclude that all objects are comprised of electrical charges. One of proton's energy is equivalent in intensity to one electron's charge. If the number of protons in an atom is equal to the number of electrons, the atom itself is neutral and has no total value.
Static electricity relates to a difference between a body's electrical charges, especially the discrepancy between a body's negative charges and those opposite. Physical means add the unbalance in the fee. The connection between solid objects is among the most common causes of static electricity. It was mentioned earlier that proton movement is not feasible, and that electrons are the only movement of electric charge seen in static electricity. 

Electrons are kept extremely loosely in materials that ensure they can be transferred by basic interaction such as rubbing. The photo below is an example of a glass rod being rubbed with silk that induces static electricity. When two objects are rubbed together to generate static electricity, one object will give up electrons and be charged more positively whilst the other element will absorb electrons and be charged more negatively. We will bear in mind that laws such as repelling charges and collecting charges unlike, apply here. Thinking of occasions where your hair seems to be hanging at its ends as you remove your hat. Static electricity is also the perpetrator here. The electrons are moved from cap to hair when you remove your hat, producing an intriguing hairdo! Keep in mind that items with the same charge repel one another. The hair will stand on end because they have the same fee. That hair just wants to get as far away as possible from each other! The same is true with regular combing of your hair with a comb. When you carry a comb you've used almost tiny bits of paper, you'll see the comb absorbs the pieces of paper. The comb loses electrons when rubbing the hair and this unbalance of charge produces static electricity which then attracts the tiny bits of paper