Electric flux The number of the magnetic lines of force passing through a surface is called as electric flux. That is, Electric flux is the measure of the number of magnetic lines of force passing through a surface and it represents the intensity of the electric field as a ratio of the number of electric … Read more
Gauss’s law According to this law, The electric flux Φₑ passing through a closed surface is 1/∈₀ times the total charge q enclosed by that surface. That is, total electric flux Φₑ = q/∈₀ where ∈₀ is the permittivity of vacuum or, Φₑ =∫Φ→E.→A = q/∈₀Gauss’s theorem in integral form. Φₑ = q/∈₀ Where ∈₀ … Read more
Importance of Coulomb’s law When a charge is stationary then only the electric force acts on it. Which was discovered by Coulomb. Therefore it is also called Coulomb force.When a charge is stationary then only the electric force acts on it. Which was discovered by Coulomb. Therefore it is also called Coulomb force. Coulomb’s law … Read more
Electric charge Electricity is the factor by which charge is generated in any object or substance. When a substance becomes electrostatic, the substance acquires charge. Therefore such a substance is called a charged substance. There are two types of electric charges. Those substances which accept charge have an excess of charge and those substances which … Read more
Accuracy, Precision And Error Analysis Accuracy All those observations taken by an instrument which are close to the actual value of a physical quantity are called actual values. That is, the accuracy of a measurement is the value that tells us how close the measured value of a quantity is to … Read more
Significant figures All the reliable and one doubtful figures included in a measurement are called significant figures. Some rules for calculating significant figures 1. All non-zero numbers are significant. Example– 1,2,3,5,9 have 5 significant digits. 2. Zero between two non-zero numbers is significant. Example– 12567.09 has 7 significant figures. 3. A … Read more
Physical World The correct concept of force is given by Newton’s laws of motion. We experience many forces in the micro world as well as in the macro world. Gravitational force and electromagnetic force are experienced in the physical world. Because the range of both of them is infinite. Whereas in the microscopic world, nuclear … Read more
Human Eye The human eye is a very valuable and sensitive sense organ. It enable us to see the wonderful world and colors around us. The human eye is like a camera. A real, inverted and small image is formed on the retina located at the back of the eye. Accommodation … Read more
