It was named after the French scientist Andre-Marie Ampere. The electric current is expressed by a unit known as an ampere ( A). The SI unit of electric charge is coulomb ( C).Ĭoulomb is equivalent to the charge contained in closely 6 × 10 18 electrons. In an electric circuit, usually, the direction of electric current (known as positive charges), is considered as opposite to the direction of the flow of electrons, which are considered as negative charges. If the electric charge flows through a conductor, such as a metallic wire, it is known as the electric current in the conductor.Ī continuous and closed path of an electric current is known as an electric circuit (as shown in the image given below) − Physics Notes for UPSC IAS Prelims (Part I).Sol: The sun is the earth’s primary source of energy. Q3: What is the earth’s primary source of energy? Sol: Albert Einstein was awarded the 1921 Nobel Prize in Physics for his work on theoretical physics. Q2: What famous scientist was awarded the 1921 Nobel Prize in Physics for his work on theoretical physics? Sol: Jupiter is the biggest planet in our solar system. Q1: What is the biggest planet in our solar system? The continuous flow of electrons through a conducting material is known as electric current. Electric Current is another aspect of Physics which play a very important role. The interactions of the Universe are governed by the four forces including – Strong, Weak, Electromagnetic and Gravitational. The law of gravitation states the gravity is strongest when between two huge objects and as and when those objects get apart, it gets much weaker. The first scientist to define the law of gravitation was Issac Newton. The gravitational force between two objects is dependent on their masses. Gravity is one of the universal forces if nature that is a force acting upon all matters. Physics is also about the study of nature and forces which are measured by the physical quantities. Physics aims to describe the function of everything that is present around us with the movement of tiny charged particles to the motion of people, flights, care.Įverything around us can be very accurately described by the law of physics. Physics uses the methods that are scientific to reveal the principles that govern light and matter and as well to discover the implications of those laws. Albert Einstein’s Theory of Relativity the laws of thermodynamics.

Some of them include Sir Isaac Newton’s Law of Gravity as well as his Three Laws of Motion. Physics is complicated but it also relies on a number of the law of nature that is accepted on discoveries and inventions.

Behind every question lies the four important aspect or terms to understand: Hypothesis, Model, Theory, and Law. It deals with matter and its relation to energy.Įverything from the rainbow formation of eclipse occurrence to the falling of things from up to down ( gravity ), the cause of sunset or sunrise is all bound to have answers and Basic Physics states it all. It is a scientific study that governs the physical world and natural phenomenon around us. Physics is concerned with every aspect of Universe. The main object of all the three division, Biology, Physics, and Chemistry are to understand the law of the universe and understand everything in it. Physics is one of the broader subjects that fall under the category of Science.

Tutorial 6 physics 101