Transformer: We know that the electric power coming into our homes is produced very far away from our homes. They are transmitted with the help of cables. But during transmission, energy is lost. To reduce the loss of energy, the voltage is raised at the power plants before transmission. At the power stations, the voltage
CBSE (VI - XII)
The foundation courses, that is, classes 8 to 10, are considered to be very critical because, as the name goes, they lay the foundation for the students’ future studies and career. These are the years that will determine or, at least, shine a light on where the students will do well in future and what line of career they will excel at. Stay in the loop of all important updates regarding CBSE foundation classes. You can also get access to practice papers and give online mock tests for free on Embibe.
Electric Bell: Definition, Principle, Construction and Working
Electric Bell: How do you know that a person is waiting at your gate? The incoming person presses the switch installed at our gates, and we hear a known ring. This ring alerts us that someone is at our door. This device is an Electronic Bell. Placed inside our homes or offices, the incoming guest
Hormones in Humans- Definition, Classification, Characteristics & Functions
Hormones in Humans: Control and coordination are very important for the normal functioning of the body. For this, two types of systems have been developed in our body, i.e., the nervous system and the endocrine system. Our nervous control is very fast, but its action is short-lived, and nerve fibres of this system cannot innervate
Stokes Law: Formula, Derivation, Terminal Velocity and Real-life Examples
We have all seen clouds floating in the sky. According to Newton’s law of gravitation, a downward force of gravity due to earth acts on every object on our planet. Then how is it that we do not see clouds falling? It is because of the Stokes Law. Stokes Law was derived by the British
Work-Energy Theorem: Derivation, Proof, Equation
Work Energy Theorem relates the work done and the subsequent change in kinetic energy of the object. To understand the relation between these two quantities, consider an example from our daily lives. Suppose you go for a run. The harder you run, the faster you can go. The speed at which you can run just
Diffraction of Light: Types, Single Slit Pattern, Sample Problems
Diffraction of Light: We classically think that light always travels in straight lines, but do you know that when light waves pass near an obstacle, they tend to bend around that obstacle and become spread out? If we look clearly at the shadow cast by an opaque object, then close to the region of geometrical
Latent Heat and Specific Latent Heat: Types, Formula & Application
Latent Heat and Specific Latent Heat: Let us do an experiment to understand Latent Heat and Specific Latent Heat. Start heating ice at \( – {4^ \circ }{\text{C}},\) the temperature of the ice will rise up to \({0^ \circ }{\text{C}}{\text{.}}\) At \({0^ \circ }{\text{C}}{\text{,}}\) the temperature of the ice will not rise even if we
Effects of Heat: Thermal Expansion – Expansion Coefficients, Thermal Stress & Strains
Thermal Expansion occurs when a material is heated. The supply of heat increases the randomness of the molecules of the substance causing thermal expansion. After gaining the heat energy, the molecules start oscillating with greater amplitudes. As a result, the average separation between them increases. When the separation between the molecules increases, the material expands.
Contact Forces: Types, Non-Contact Forces and Frequently Asked Questions
Contact Forces: To understand the concept of contact forces, Let us first understand what force is. A force is either a push or a pull. A force is an external agent that is capable of changing the state of rest or motion of an object. Force can bring a moving body to the state of
Feeding & Digestion in Amoeba – Mode of Nutrition and Steps of Nutrition in Amoeba
Feeding and Digestion in Amoeba: All living organisms require food to get energy for several metabolic, physiological, and physical processes. Food is also required to develop resistance against diseases. Amoeba is a unicellular, eukaryotic protozoan. All protozoans are believed to be the most primitive ancestors in the evolutionary history of animals. Like humans, Amoeba also