How to get volume from density and mass? One cannot get the volume of a substance from only the density of the substance. The mass of the substance is also required to find it. There is a relation between the density, volume and mass of a substance as Volume = mass × density. If m … Read more
In another article, we have discussed Gravity, Newton’s universal law of gravitation and the formula for gravitational force. In this article, we are going to learn how to calculate the gravitational force of attraction between two objects like Earth and Sun, Earth and Moon, electron and proton, etc. Contents of this article: How to calculate … Read more
The term Moment of inertia is used in physics to describe the rotation of an object. The moment of inertia has the same mathematical role in rotational motion as that of the mass in linear motion. But the physical significance of the moment of inertia is different from that of the mass of an object. … Read more
Hypothesis is a predicted theory that satisfies other phenomena but isn’t verified experimentally. Scientist de Broglie gave a such type of theory for the matter particles which plays important roles in Quantum mechanics. In this article, we are going to discuss de Broglie hypothesis for matter waves in quantum mechanics, its explanation and formula and … Read more
Albert Einstein won the Nobel Prize in 1905 for his explanation of Photoelectric effect. There were some failures of classical mechanics to explain this phenomenon. Then Einstein explained it on the basis of quantum theory. In this article, we are going to explore the definition and properties of Photoelectric effect explained by Einstein and will … Read more
Most of the materials are affected by the magnetic field. These materials are magnetic materials. These materials can show magnetic properties. The origin of magnetic moment in these materials is the rotation of orbital electrons around the nucleus. On the basis of the magnetic properties of materials, there are five types of magnetic materials – … Read more
The origin of magnetism is the motion of charged particles. In every atom, there are some electrons and protons. As the electrons are revolving around the nucleus and also spinning around their own axes, the atomic system behaves like a magnetic dipole. Therefore, atoms can produce a magnetic field or can have a magnetic moment … Read more
Nuclear fission and nuclear fusion are two nuclear phenomena to produce nuclear heat energy. But these two phenomena occur in different conditions and the amount of heat generation is also different in these two phenomena. In this article, we are going to discuss the definition, properties, examples, uses and differences between nuclear fission and nuclear … Read more
In recent exam pattern of class 8, 10 and 12, MCQ and short questions carry majority marks. In this context multiple choice questions are very much important to secure a good score in exams. Students need to find MCQs from the textbooks. But most of the students fail to gather majority of inside questions. Therefore, … Read more
A capacitor can store electric charges and releases them whenever it is required. But how can a capacitor store energy in it? What is the formula of energy stored in a capacitor? The application of an external voltage across a capacitor produces an electric field between the plates of the capacitor. This electric field moves … Read more
