The CBSE class 12 physics notes are important for students preparing for the exams. They should get the study materials they need as early as possible, so that they can complete the assignments on time. Fortunately, there are a few ways to find the notes. First, you can use the school’s website, or you can get the notes online. In addition, you can ask a teacher or friend for the notes. Depending on where you live, you may have access to a local library that offers physics notes.
Electronic devices
Electronic devices are a big part of the modern day world. It is essential to know the basic concepts of electronics before you start applying them. These subjects are very fun and interesting to learn. However, they are also time consuming. Hence, it is important to plan your study strategy accordingly.
To ensure that you do not miss any of the important information, there are a few resources you can turn to. Some of these include Vedantu, SelfStudy, and myCBSEguide. Using these resources will make your learning experience more fruitful.
For instance, Vedantu’s class 12 Physics revision notes and class 12 chemistry notes are an excellent source of information. They provide an overview of the chapter’s most relevant facts. And to help you understand what the fuss is all about, they are available in both PDF and mobile app formats.
Extrinsic Semiconductors
Extrinsic semiconductors are pure semiconductors that have been doped with impurities to produce conductivity. These impurities are commonly called dopants. They enhance the number of electrons and holes in the crystal, increasing the conductivity. In addition, the addition of metallic impurities changes the conducting properties of semiconductors.
There are two types of extrinsic semiconductors: n-type and p-type. The difference between them lies in the fact that n-type semiconductors have a majority of electrons while p-type semiconductors have a majority of holes.
If there is a significant energy gap between the valance band and the conduction band, an electron can move from the valance band to the conduction band with a minimal amount of energy. However, this probability is relatively small.
Convex lens
Convex lens is one of the most common types of lenses. It is used in telescopes, binoculars, projectors and peep holes. This type of lens is also used in spectacles.
Convex lenses form images of different size and nature. They can form real, inverted and magnified images. In the following sections we will discuss the characteristics of convex lens images.
In convex lenses, the beam of light which is parallel to the principal axis of the lens converges at the principal focus. The ray of light will then appear to be straight. However, the ray will not pass through the virtual image.
If an object is placed at a point between the F and O points of the lens, an image will be formed at that point. But if the object is further from the lens, the distance between the F and 2F points will produce a less sharp image.
Concave mirror
Concave mirror is a type of reflective surface. It can create a real or inverted image. There are some fundamental parameters that must be considered to make a concave mirror. These are the principal axis, focal length, and radius of curvature.
The distance between the principal axis and the focus is called the focal length. As the distance between the object and the mirror increases, the size of the image also increases. To determine the position of the image, ray diagrams are used. A ray diagram has to include two sets of reflected rays.
One ray that passes through the focus of the mirror will converge to the principal axis. Normally, the ray will pass through the centre of curvature. This centre is not part of the mirror, but is formed by a part of the spherical mirror.
Develop interest in physics
One of the most difficult subjects to study is Physics. It requires a strong foundation in maths and science. In order to get good marks, you must understand all the concepts. Here are some study tips to help you achieve your goal.
The first thing you should know is that there are many ways to study physics. For example, by reading a good book on the subject. You can also watch interesting experiments on YouTube. However, you must make sure that the information you learn is relevant to the real world.
Another useful way to learn is to get involved with your school. You can attend lectures or even ask your teacher for demonstrations. But, if you want to go a step further, you can get a private tutor to teach you.
