Best books for JEE Advanced - Best book for JEE preparations - eSaral
Hey, are you looking for the best books for JEE Advanced preparations? If yes. Then you are at the right place. If you want to get a good rank in JEE Advanced exam then it is very important for you to refer a good book for JEE Advanced Exam preparations along with other study material. A good book will help you to understand the important concepts of subjects. If you get a good rank in JEE Advanced Exam then you can get the Admission for Engineering in top IIT’s. But getting a good rank in JEE A...
Read More →Best Books for JEE Main - Best book for JEE preparations - 2022
Hey, are you preparing for JEE Main 2022? If yes. Then you must know what are the best books for JEE Main that you should refer to understand different concepts and to build a good foundation to understand the advanced concepts of subjects. There are a lot of different IIT JEE Mains preparation books available in the market that you can refer to start your studies but if you are looking for the best books that you can use to build a strong understanding of concepts then you are at the right plac...
Read More →CBSE Class 12 Math Syllabus 2020-2021 - Detailed Syllabus - eSaral
According to the CBSE board class 12 Math syllabus of session 2020 - 2021 will be the same as session 2019 - 2020 which means there will be no change in the syllabus. By going through the syllabus students will get the idea about all the units and chapters of class 12 Math. UNIT TOPICS Unit-I: Sets and Functions Sets ·Sets and their representations. Empty set.Finite and Infinite sets Equal sets.Subsets.Subsets of a set of real numbers especially intervals (with notations). Power set. Universal s...
Read More →CBSE Class 12 Physics Syllabus 2020-2021 - Detailed Syllabus - eSaral
According to the CBSE board class 12 Physics syllabus of session 2020 - 2021 will be the same as session 2019 - 2020 which means there will be no change in the syllabus. By going through the syllabus students will get the idea about all the units and chapters of class 12 Physics. CHAPTER TOPICS Chapter–1 Electric Charges and Fields Electric Charges Conservation of charge, Coulomb's law-force between two point charges Forces between multiple charges superposition principle and continuous charge d...
Read More →JEE Main Previous year Question Paper - Free Download - PDF
If you want to score good in JEE Main Exam then it is super important for you to solve JEE Main Previous year question papers. Previous year question papers of JEE Main EXAMS helps students to get the idea about the paper patter, Important topics, and so many different things that are important for JEE students. In this post we have listed a wide list of JEE Main Previous year question papers. So you don’t have to go anywhere else to download the previous year question papers to boost your JEE M...
Read More →Universal law of gravitation class 11 - Physics, Gravitation - eSaral
Hey, are you in Class 11? or do you want to learn about the universal law of gravitation for class 11? If yes. Then you are at the right place. Newton's Universal Law of Gravitation Any two particles of matter anywhere in the universe attract each other with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them, the direction of the force being along the line joining the particles, i.e. $\mathrm{F} \propto \fra...
Read More →What is friction in physics - Friction, Physics, class 11 - eSaral
Friction is the opposing force that is set up between the surfaces of contact. If you want to learn what is friction in physics then keep reading. Friction Friction is the opposing force that is set up between the surfaces of contact when one body slides or rolls or tends to do so on the surface of another body. For example, if a book on a table slides from left to right along the surface of a table, a frictional force directed from the right to left acts on the book at the surface of contact i....
Read More →What is dynamic friction in physics - Friction, Class 11 - eSaral
Hey, do you want to know What is dynamic friction in physics? If yes. Then keep reading. Dynamic Friction When the force acting on the body is greater than the limiting friction, then the body comes into motion. The friction now acting between the surfaces of contact is dynamic friction. The dynamic friction is always less than the limiting static friction. Dynamic friction is of two types: Sliding Friction Rolling Friction Sliding Friction: If one body begins to slides over the other, then the ...
Read More →What is Static Friction - Friction, Physics, Class 11 - eSaral
Hey, do you want to know what is Static Friction? If yes. Then keep reading. Static friction The frictional force between two surfaces before the relative motion actually starts is called static frictional force or static friction. If we slowly increase the force with which we are pulling the box, the graph shows that the friction force increases with our force up to a certain critical value, $\mathrm{f}_{\mathrm{L}}$, the box suddenly begins to move, and as soon as it starts moving, a smaller f...
Read More →Motion in a lift - Laws of Motion, Physics, Class 11 - eSaral
Hey, do you want to learn about the Motion in a lift? If yes. Then keep reading. Motion in a Lift The weight of a body is simply the force exerted by the earth on the body. If the body is on an accelerated platform, the body experiences a fictitious force, so the weight of the body appears changed and this new weight is called apparent weight. Let a man of weight W = Mg be standing in a lift. We consider the following cases: Case (a) If the lift moving with constant velocity v upwards or downwar...
Read More →Frame of reference in physics - Inertial and Non-inertial - eSaral
A non-accelerating frame of reference is called an inertial frame of reference. If you want to learn more about the frame of reference in physics. Then keep reading. Inertial and accelerated frames of reference (a) Inertial frames of reference: A non-accelerating frame of reference is called an inertial frame of reference. A frame of reference moving with a constant velocity is an inertial frame of reference. All the fundamental laws of physics have been formulated in respect of the inertial fra...
Read More →Motion of bodies connected by strings - Physics Class 11 - eSaral
Hey, do you want to learn about the motion of bodies connected by strings? If yes. Then you are at the right place. The motion of bodies connected by strings Two bodies : Let us consider the case of two bodies of masses $\mathrm{m}_{1}$ and $\mathrm{m}_{2}$ connected by a thread and placed on a smooth horizontal surface as shown in fig. A force F is applied on the body of mass $\mathrm{m}_{2}$ in forwarding direction as shown. Our aim is to consider the acceleration of the system and the tension...
Read More →Motion of bodies in contact - Physics Class 11 - eSaral
Hey, do you want to learn about the motion of bodies in contact? If yes. Then you are at the right place. The motion of bodies in contact (a) When two bodies of masses $\mathrm{m}_{1}$ and $\mathrm{m}_{2}$ are kept on the frictionless surface and a force F is applied on one body, then the force with which one body presses the other at the point of contact is called Force of Contact. These two bodies will move with same acceleration = a. When the force F acts on the body with mass $\mathrm{m}_{1}...
Read More →Applications of impulse - Impulse, Physics - eSaral
Hey do you want to learn about the applications of impulse? If so, Then you are at the right place Impulse It is not convenient to measure the varying force of impact. Suppose that $\overrightarrow{\mathrm{F}}$ av is the average force acting during impact and $t$ is the small-time for which the impact lasts. In such situations, it is found that the quantity Fav. It is very easy to measure. The quantity $\overrightarrow{\mathrm{F}}_{\text {av }} . \mathrm{t}$ is called impulse. If a variable forc...
Read More →Horizontal Projectile motion - Motion in Plane - eSaral
Hey, do you want to learn about Horizontal projectile motion? If yes. Then you are at the right place. Horizontal Projectile motion Suppose a body is thrown horizontally from point O, with velocity u. Height of O from ground = H. Let X-axis be along horizontal and Y-axis be vertically downwards and origin O is at point of projection as shown in fig. Let the particle be at P at a time t. The co-ordinates of P are (x, y) Distance travelled along X-axis at time t with uniform velocity i.e. Velocity...
Read More →Oblique Projectile motion - Motion in Plane - eSaral
Hey, do you want to learn about the Oblique Projectile motion? If yes. Then keep reading. Oblique Projectile motion Consider the motion of a bullet which is fired from a gun so that its initial velocity $\overrightarrow{\mathrm{u}}$ makes an angle $\theta$ with the horizontal direction. Let us take $X$ -axis along ground and Y-axis along vertical. $\overrightarrow{\mathrm{u}}$ can be resolved as $\mathrm{u}_{\mathrm{x}}=\mathrm{u} \cos \theta \quad$ (along horizontal) $\ u_{y}=u \sin \theta$ (al...
Read More →Motion in two dimensions - Motion in Plane - eSaral
An object moving in a plane is said to have two-dimensional motion. If you want to learn more about Motion in two dimensions. Then read this article till the end. Motion in Two Dimensions An object moving in a plane is said to have two-dimensional motion. The two-dimensional motion is equal to the vector sum of two one-dimensional motions along a mutually perpendicular direction. Let the position of point P at a time t be given by position vector $\overrightarrow{\mathrm{OP}}=\overrightarrow{\ma...
Read More →State the law of radioactive decay - Radioactivity, Physics - eSaral
Hey, students do you want to know how to state the law of radioactive decay? If yes. Then read this article till the end. Radioactive decay law The rate of decay (number of disintegrations per second) is proportional to number of radioactive atoms (N) present at that time t rate of decay $\frac{-\mathrm{d} \mathrm{N}}{\mathrm{dt}} \propto \mathrm{N}$ or $\frac{\mathrm{d} \mathrm{N}}{\mathrm{dt}}=-\lambda \mathrm{N}$ or $\quad N=N_{0} e^{-\lambda t}$.....(1) where $\lambda$ is disintegration cons...
Read More →Uses of radioactive isotopes - Radioactivity, Physics - eSaral
Hey, do you want to learn about the uses of radioactive isotopes? If yes. Then you are at the right place. Uses of radioactive isotopes In Medicine a. $\mathrm{Co}^{60}$ for treatment of cancerb. $\mathrm{Na}^{24}$ for circulation of blood c. $\mathbf{I}^{131}$ for thyroid d. $S r^{90}$ for treatment of skin eye e. $\mathrm{Fe}^{59}$ for location of brain tumor f. Radiographs of castings and teeth In Industries a. For detecting leakage in water and oil pipe lines b. For investigation of wear tea...
Read More →Working of NPN and PNP transistor - Electronics, Physics - eSaral
Hey, do you want to learn about the Working of NPN and PNP transistor? if yes. Then you are at the right place. P-N-P Transistor: The holes of the P region (emitter) are rippled by the positive terminal of battery $\mathrm{V}_{\mathrm{EE}}$ towards the base. The potential barrier at the emitter junction is reduced as it is forward bias and hence the holes cross this junction and penetrate into the N region. This constitutes the emitter current. The width of the base region is very thin and it is...
Read More →What is Transistor and its types - Physics, Electronics - eSaral
A Transistor is an electronic device formed by P and N types of semiconductors. If you want to know about what is transistor and its types then read this article till the end. Transistor Transistor is used in place of triode valve, it is an electronic device formed by P and N types of semiconductors. It was discovered by American scientist J Barden, W.H. Bratain, W. Shockley. The transistor is three-terminal and two P-N Jn. device. There are two types of transistors N-P-N transistor P-N-P transi...
Read More →Different types of PN-junction diodes - Electronics - eSaral
Diode is a PN junction device. If you want to know about the different types of PN-junction diodes then keep reading. Different types of PN-junction diodes 1. Light Emitting Diode (LED) Very much used in a dancing light display of music systems and information boards on railway stations. In a forward-biased diode, the energy produced by recombination of electrons and holes at the junction can be emitted. If the energy is in the visible region, such a diode is called a light-emitting diode or LED...
Read More →Bridge rectifier circuit diagram - Definition, Efficiency - eSaral
Bridge Rectifier is also a full-wave rectifier. If you want to learn about the Bridge rectifier and Bridge rectifier circuit diagram then keep reading. Bridge Rectifier It is also a full-wave rectifier. Use of bridge rectifier The bridge rectifier is used in the rectifier type voltmeter. The circuit arrangement is shown in fig. The rectifier elements are p-n junction diodes with a sensitive DC. ammeter as a load. This circuit can be used for the measurement of AC as well as DC voltage and curren...
Read More →Full wave rectifier circuit diagram - Definition, Ripple Factor - eSaral
A device that rectifies both halves of the ac input is called a full-wave rectifier. If you want to learn about the full-wave rectifier and full-wave rectifier circuit diagram then keep reading. Full-wave rectifier: A rectifier that rectifies both halves of the ac input is called a full-wave rectifier. During the first half of the input cycle, the upper end of S coil is at positive potential and the lower end is at the negative potential the junction diode $\mathrm{D}_{1}$ will get forward biase...
Read More →Half wave rectifier circuit diagram - Definition, Explanation - eSaral
A device that converts alternating current into Direct current is called a rectifier. If you want to learn about the half-wave rectifier and half-wave rectifier circuit diagram then you are at the right place. Application of diode as a rectifier: An electronic device that converts alternating current into Direct current is called a rectifier. Half wave rectifier: A rectifier, which rectifies only one half of each ac supply cycle is called a half-wave rectifier. During the first half of the input...
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