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. […]
Science > Biology > Human Anatomy and Physiology > Cardiovascular System > Disorder Associated With RBCs Anaemia (Anemia) Anaemia or Anemia is defined as a decrease in the ability of the blood to carry oxygen due to (1) a decrease in the total number of erythrocytes, each having a normal quantity of hemoglobin, or (2) […]
Science > Biology > Human Anatomy and Physiology > Cardiovascular System > Composition of Blood: Erythrocytes When a human blood sample is prevented from clotting and spun in a test tube (centrifuged), in a machine called a centrifuge, the blood separates into a straw coloured liquid called plasma and a dark brown mass of blood […]
Science > Biology > Human Anatomy and Physiology > Cardiovascular System > Composition of Blood: Blood Plasma When a human blood sample is prevented from clotting and spun in a test tube (centrifuged), in a machine called a centrifuge, the blood separates into a straw coloured liquid called plasma and a dark brown mass […]
Science > Biology > Human Anatomy and Physiology > Cardiovascular System > The blood, an Overview In the Cardiovascular system, the ‘‘heart’’ (cardi) pumps the blood in a ‘‘little circle’’ (circul), which travels through ‘‘little vessels’’ (vascul). In human, the transportation is done through blood circulatory system and lymphatic system. Thus two fluids move through […]
Science > Biology > Human Anatomy and Physiology > Cardiovascular System > Circulatory System and its Function In living things, many substances such as food, gases, minerals salts, hormones and waste products have to be transported from one part of the body to another. Plants and animals have a system of transporting substances throughout their body. […]
Science > Biology > Digestion and absorption in Human > Nutrition Energy is required by living beings for performing different activities. Energy is contained in the food. Food can be defined as a collection of chemicals taken by an organism for the purpose of the growth, repair, and replacement of body cells, energy releases, and […]