Plus Two | Public Exam | Physics | വെറും 2 മണിക്കൂർ കൊണ്ട് Full Chapter പഠിച്ചു Full Mark നേടാം|Girish Physics Magnetic substances are materials that exhibit magnetic properties. When these substances are subjected to the Earth's magnetic field, they

Plus Two | Public Exam | Physics | വെറും 2 മണിക്കൂർ കൊണ്ട് Full Chapter പഠിച്ചു Full Mark നേടാം|Girish Physics Magnetic substances are materials that exhibit magnetic properties. When these substances are subjected to the Earth's magnetic field, they tend to align themselves in a north-south direction. This property is known as the directive property. The distance between the poles of a magnet is called its magnetic length. The intensity of the magnetic field at a given point is directly proportional to the square of the cosine of the angle between the polarizing directions of the polarizer and analyzer at that point. The charge of an electron is typically 1.6 x 10-19 coulombs. The intensity of light is proportional to the square of its amplitude and its refraction is governed by the laws of optics. Electric flux is a measure of the electric field strength through a given area. The electric intensity due to an infinite plane sheet of charge or a spherical shell depends on the distance from the charge and the shape of the surface on which the charge is distributed. During a thunderstorm or lightning strike, it is safest to be inside a car or building rather than in an open ground area. The force of an object is equal to the product of its mass and acceleration, and is typically measured in units of newtons (N).