SATHEE: Physics

Physics Bipolar Junction Transistor

Bipolar Junction Transistor A bipolar junction transistor (BJT) is a three-terminal electronic device that acts as an amplifier or switch. It is made of semiconductor material and has two PN junctions. The three terminals of a BJT are called the emitter, base, and collector. BJTs are versatile electronic devices that are used in a wide variety of applications. They are relatively easy to use and have a number of advantages over other types of transistors.

January 1, 0001 read

Physics Black Body Radiation

What is Black Body Radiation? Black body radiation refers to the electromagnetic radiation emitted by an ideal black body. A black body is a theoretical concept that absorbs all incident electromagnetic radiation and does not reflect or transmit any of it. The radiation emitted by a black body is solely due to its temperature and is independent of its material composition or surface texture. Key Points: Black Body: A black body is an ideal object that absorbs all incident electromagnetic radiation and does not reflect or transmit any of it.

January 1, 0001 read

Physics Boltzmann Constant

What is Boltzmann Constant? The Boltzmann constant, denoted by the symbol $k_{B}$ , is a fundamental physical constant that relates the average kinetic energy of particles in a system to the system’s temperature. It is a key quantity in statistical mechanics, thermodynamics, and many other branches of physics. Definition The Boltzmann constant is defined as the ratio of the gas constant $R$ to the Avogadro constant $N_{A}$ : $k_{B} = \frac{R}{N_{A}}$ where:

January 1, 0001 read

Physics Braille

Braille Braille is a tactile writing and reading system used by blind and visually impaired people. It was invented by Louis Braille, a blind Frenchman, in the 1820s. Braille is based on a system of raised dots that are arranged in cells. Each cell contains one to six dots, and each dot represents a different letter, number, or punctuation mark. How Braille Works Braille is read by touch. The reader uses their fingers to feel the raised dots and interpret them as letters, numbers, or punctuation marks.

January 1, 0001 read

Physics Buoyant Force

Buoyant Force Buoyant force is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In other words, it is the upward thrust experienced by an object when it is placed in a fluid. Buoyant force is a fundamental concept in fluid mechanics and has numerous applications in various fields, including physics, engineering, and marine science. Key Points: Buoyant force is a result of the difference in pressure between the top and bottom surfaces of an immersed object.

January 1, 0001 read

Physics Calorimeter

Calorimeter A calorimeter is a device used to measure the heat involved in a chemical reaction or physical change. It is typically made of metal and is insulated to minimize heat loss. The calorimeter contains a reaction chamber, where the reaction takes place, and a thermometer, which measures the temperature change. Calorimeter Diagram A calorimeter diagram is a graphical representation of the heat flow in a calorimeter. It is used to determine the heat capacity of a substance or the heat of a reaction.

January 1, 0001 read

Physics Centre Of Mass And Centre Of Gravity

Centre of Mass The centre of mass of an object is the point where all of its mass is evenly distributed. It is also known as the centroid or the geometric centre. Calculating the Centre of Mass The centre of mass of an object can be calculated by finding the average of the positions of all of its particles. For a continuous object, this can be done by integrating the mass density over the entire volume of the object.

January 1, 0001 read

Physics Centripetal Force

What is Centripetal Force? Centripetal force is the net force that acts on an object moving in a circular path, pulling it toward the center of the circle. It is directed toward the center of the circle and is necessary to keep the object moving in a circular path. Without centripetal force, the object would move in a straight line. Understanding Centripetal Force Centripetal force is a real force that acts on an object, even though it is not a contact force.

January 1, 0001 read

Physics Characteristics Of Em Waves

What are EM waves? Electromagnetic (EM) waves are a type of energy that travels through space in the form of oscillating electric and magnetic fields. They are generated by the movement of charged particles and can exist over a wide range of frequencies, from extremely low frequencies (ELF) to extremely high frequencies (EHF). Types of EM waves The EM spectrum is divided into several different types of waves, each with its own unique characteristics and applications.

January 1, 0001 read

Physics Charge Transfer

Charge Transfer Charge transfer is the movement of electrons from one atom or molecule to another. It is a fundamental process in chemistry and biology, and it plays a role in many everyday phenomena, such as the flow of electricity, the burning of fuel, and the photosynthesis of plants. Types of Charge Transfer There are two main types of charge transfer: Homogeneous charge transfer occurs between two atoms or molecules that are the same.

January 1, 0001 read

Physics Charging By Induction

Charging by Induction Induction charging is a method of wirelessly transferring electrical energy between two objects. It is based on the principle of electromagnetic induction, which states that when a conductor is exposed to a changing magnetic field, an electromotive force (EMF) is induced in the conductor. This EMF can then be used to drive an electric current. In the case of induction charging, the two objects are a transmitting coil and a receiving coil.

January 1, 0001 read

Physics Cherenkov Radiation

What is Cherenkov Radiation? Cherenkov radiation is a unique and fascinating optical phenomenon that occurs when a charged particle moves through a medium at a speed greater than the speed of light in that medium. This phenomenon is named after the Soviet physicist Pavel Alekseyevich Cherenkov, who first observed and studied it in 1934. Understanding Cherenkov Radiation To comprehend Cherenkov radiation, it’s essential to grasp the concept of the speed of light in different media.

January 1, 0001 read

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Physics Bipolar Junction Transistor

Physics Black Body Radiation

Physics Boltzmann Constant

Physics Braille

Physics Buoyant Force

Physics Calorimeter

Physics Centre Of Mass And Centre Of Gravity

Physics Centripetal Force

Physics Characteristics Of Em Waves

Physics Charge Transfer

Physics Charging By Induction

Physics Cherenkov Radiation

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