Imagine a wire to be suspended from a rigid support and carrying a hanger on which suitable weights could be placed to study the behaviour of the wire under conditions of different loads. The extensions of the wire are suitably...
Category - Physics
English Physicist Robert Hook in the year 1676 put forward the relation between the extension produced in a wire and the restoring force developed in it. The law formulated on the basis of this study is known as Hooke’s...
Consider a cubic crystal of lattice constant ‘a’. The density of the crystal = ρ Volume of the unit cell = a³ Eqn 1 Mass in each unit cell = ρa³ The number of atoms per unit cell = n The atomic weight of the...
A face centred cubic structure consists of eight corner atoms and six face centred atoms. Examples: Copper, Nickel, Gold, Lead and Platinum. The arrangement of atoms in face centred cubic unit cell is shown in Fig. Number of...
Let us discuss some of the important parameters which are used to describe the crystal structure. Number of atoms per unit cell The total number of atoms present in an unit cell is known as number of atoms per unit cell. The...
Based on the crystal structure point of view, the solids can be classified into two categories namely: Crystalline (or) Crystals and Non-crystalline (or) Amorphous solids. Crystalline solids or Crystals Crystalline solids (or)...
1. What is a dielectric material? State their property. Dielectrics are the insulating materials having electric dipole moment permanently or temporarily by applying the electric field. These are mainly used to store electrical...
1. What is meant by magnetic materials? Give examples? Magnetic materials are the materials which can be easily magnetized by keeping it in an external magnetic field. Examples: Iron, Ferrites, Carbon steel etc. 2. Define...
1. What is a semiconductor? The materials in which the electrical conductivity lies between conductors and insulators are called semiconductors. They have resistivity value between 10-4 to 0.05 ohm-m. The electrical conductivity...
1. What is a conducting material? The material possessing higher electrical and thermal conductivities are called conducting materials. The resistance of such materials are very low. The conducting property of a material depends...
