An electromagnet is a temporary strong magnet made of a piece of soft iron when current flows in the coil wound around it. It is an artificial magnet. Electromagnets are mainly used for the following purposes: Electromagnetism PDF Download PDF
When two bodies at different temperatures are kept in contact, heat flows from the body at a higher temperature to the body at a lower temperature. The measurement of heat is called calorimetry. The SI unit of heat is joule (J). The other most commonly used unit of heat is calorie (cal). The heat energy
When a ray of light passes from one medium to another medium, it gets deviated from its path because of the difference in speeds of light in the two media. Newton allowed the white light from the Sun to enter a darkened room through a small aperture in a window and placed a glass prism
Force is a physical cause that changes (or tends to change) either the size or shape or the state of rest or motion of the body. The forces which act on bodies when they are in physical contact are called contact forces. When a body moves over a rough surface, a force acts on the
The substances which disintegrate (or decay) by the spontaneous emission of radiation are called radioactive substances. Examples: Uranium, radium, polonium, thorium, actinium, etc. The isotopes of nearly all the elements of an atomic number higher than 82 (i.e. lead) are radioactive. These are called natural radioactive substances. The phenomenon of radioactivity cannot be due to
Current is the rate of flow of charge across a cross-section normal to the direction of flow of current. It is a scalar quantity. Its SI unit is ampere (A). Current is one ampere if the rate of flow of charge is one coulomb per second. If n electrons pass through the cross-section of a
Power is the rate of doing work, i.e. it is the work done (or energy consumed) in 1 s. In an electrical circuit, we define power as the rate at which electrical energy is supplied by the source. The SI unit of power is watt (W) or J s−1. One watt is the power consumed
The change in the direction of the path of light when it passes from one transparent medium to another transparent medium is called refraction. The refraction of light is a surface phenomenon. Refraction of Light PDF Download PDF
Work is any physical or mental activity that one does to perform daily tasks. However, in scientific parlance, work is done when a force produces motion in an object. We can define energy as the capacity to do work. The amount of energy possessed by a body is the amount of work it can do
We are proud to offer customized ICSE Class 9 Physics Notes, tailored to meet the specific needs of students. Our comprehensive collection covers the following chapters: ICSE Class 9 Physics Chapters Reflection of Light Motion in One Dimension Current Electricity Magnetism Laws of Motion Upthrust in Fluids, Archimedes’ Principle and Floatation Measurements and Experimentation Heat