The core of the transformers undergoes anumber of cycles of magnetisation and energy is lost due to______.. This can be reduced by using a material such as_________.

Read the following passage and answer the questions given. The production and improper disposal of waste are causes for a great deal of environmental pollution. Many toxic industrial wastes from manufacturing process require treatment and /or safe disposal. When materials are recycled, apart from saving on the coast of raw material, waste disposal coast are reduced. Some combustible materials like dried leaves etc can be burnt to get heat energy. Sewage treatment includes filtering, scudge settlement, degradation coagulation disinfection using chlorine etc. Certain microorganisms can degrade waste in the absence of oxygen-digestion. Sewage water is purified by: light, Fishes, Microorganisms, Aquatic plants

Read the following passage and answer the questions given. The production and improper disposal of waste are causes for a great deal of environmental pollution. Many toxic industrial wastes from manufacturing process require treatment and /or safe disposal. When materials are recycled, apart from saving on the coast of raw material, waste disposal coast are reduced. Some combustible materials like dried leaves etc can be burnt to get heat energy. Sewage treatment includes filtering, scudge settlement, degradation coagulation disinfection using chlorine etc. Certain microorganisms can degrade waste in the absence of oxygen-digestion. Which of the following statements about sewage treatment is false?

Read the following passage and answer the questions given. The production and improper disposal of waste are causes for a great deal of environmental pollution. Many toxic industrial wastes from manufacturing process require treatment and /or safe disposal. When materials are recycled, apart from saving on the coast of raw material, waste disposal coast are reduced. Some combustible materials like dried leaves etc can be burnt to get heat energy. Sewage treatment includes filtering, scudge settlement, degradation coagulation disinfection using chlorine etc. Certain microorganisms can degrade waste in the absence of oxygen-digestion. Proper management of disposal of household and industrial waste can be done by I. Recycling II. Incineration III. Sewage treatment IV. Digestion : I and II only; I and III only; I,II and III; All the above

In symmetric charge configurations, the electric field can be easily calculated using Gauss’s law. A sphere of radius ‘a‘ is made of Insulating material and has charge distributed uniformly throughout its volume. Let the charge density be rho . Find the field due to the charge for rlea .

A stepdown transformer used in the line AC of 220 V to light up a bulb marked 12V, 30 W:-Suggest a method to modify the core so that the heat produced In the core can be minimised.

Born Haber cycle can be used for the calculation of:- lattice energy of ionic crystals, electron affinity of elements, heats of formation of ionic crystals, all the above.