Science > Physics > Elasticity > Numerical Problems on Poisson’s Ratio In this article, we shall study the concept of poisson’s ratio and numerical problems on it. The concept of this constant (Poisson,s ratio) was introduced by physicist Simeon Poisson. When a rod or wire is subjected to tensile stress, its length increases in the […]
Science > Physics > Elasticity > Numerical Problems on Stress, Strain, and Young’s Modulus In this article, we shall study concept application and numerical problems on longitudinal stress, longitudinal strain, Young’s modulus of elasticity. Conversion Factors: From To Factor mm m x 10-3 cm m x 10-2 m mm x 103 m cm x 102 […]
Science > Physics > Magnetism > Torque Acting on Bar Magnet in Uniform Magnetic Field In this article, we shall study the force acting on poles and torque action on bar magnet suspended in a uniform magnetic field. Force Between Two Magnetic Poles (Inverse Square law): If two poles of strengths m1 and m2 separated […]
Science > Physics > Magnetism > Magnetic Dipole Moment of a Magnet In this article, we shall study the terminology of a bar magnet and the concept of the magnetic dipole moment of a magnet. Bar Magnet: A bar magnet is a rectangular parallelepiped body which exhibits magnetic properties. When a bar magnet is suspended […]
Science > Physics > Magnetism > Types of Magnetic Materials In this article, we shall study types of magnetism, types of magnetic material, and Curie temperature. On the basis of magnetic behaviour magnetic materials are classified into three types: diamagnetic, paramagnetic, and ferromagnetic substances. Origin of Magnetism: The origin of magnetism in substances can be […]
Science > Physics > Magnetism > Magnetic Field and Geomagnetism The branch of physics which deals with the study of earth’s magnetic field is called terrestrial magnetism or geomagnetism. The magnetism on the surface of the earth can be approximately represented by assuming a huge imaginary bar magnet in the interior of the earth. The […]
Science > Physics > Magnetism > Magnetic Field and Magnetic Lines of Force In this article, we shall study the concept of a magnetic field, magnetic lines of force, types of magnetic material. When a magnetic needle is kept on a wooden table it comes to rest in the north-south direction. If another magnet is […]
Science > Physics > Magnetism > Magnetization and Demagnetization In this article, we shall study the methods of magnetization, methods of demagnetization and Induced Magnetization. The process of converting iron or its alloys into a magnet is called magnetization. Methods of Magnetization: Single Touch Method: Keep the bar which is to be magnetized on a […]
Science > Physics > Magnetism > Properties of Magnet In this article, we shall see the properties of magnet and experiments to verify them Types of Material: Magnetic Materials: Materials which are attracted by magnets are called magnetic material. e.g. Iron, cobalt, nickel Nonmagnetic Materials: Materials which are not attracted by magnets are called non-magnetic […]
Science > Physics > Magnetism > Magnets About 600 to 800 BC the people living in Magnesia in Asia Minor found a stone (an ore of iron Magnetite Fe2O3) which was capable of attracting iron pieces towards it. They called this stone as magnetite. During the course of time, the name changed to a magnet. […]