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What is the purpose of providing an iron core in a transformer?
The purpose of providing iron core in a step-up transformer is
Which of the following are not chemical changes? 1. Tempering of iron 2. Conversion of the iron piece into an electro-magnet by passing the current around the iron 3. Melting of iron 4. Rusting of iron Select the correct answer using the code given below:
Out of the total production of iron from hematite, an ore of Iron, 20% of the ore gets wasted, and out of the remaining iron, only 25% is pure iron. If the pure iron obtained in a year from a mine of hematite was 80,000 kg, then the quantity of hematite mined from that mine in the year is
Which of the following statements are true with respect to iron ore?
I. Limestone and coal are important for smelting iron ore
II. More than 20% of the world iron ore deposits are in India
III. Odisha and Jharkhand top in the production of iron ore
IV. Iran is the largest buyer of Indian iron ore
Which of the following statements is/are correct? A. Fraternity is a core value of the Indian Constitution. B. It is a core value because it is explicitly mentioned in Part III of the Indian Constitution. C. It is not a core value of the Indian Constitution because it is not mentioned in the Constitution of India. D. It is a core value because it is a part of the Preamble and has been held to be part of the basic structure of the Constitution.
Consider the following with respect to the term 'Core Inflation': A) Core Inflation is the inflation rate of a particular basket of commodities. B) Core Inflation is the sudden increase in prices of certain items of food grains.C) Core inflation is caused by supply shock in certain essential commodities.
A 100 VA, 120/12 V transformer is to be connected so as to form a step-up transformer. A Primary voltage of 120 V is applied to the transformer. What is the secondary voltage of the transformer?
Components of the National Anaemia Programme are
1. promotion of regular consumption of Iron rich foods.
2. providing 60 mg iron and 500 mg folic acid for 100 days to a pregnant woman.
3. identification and treatment of severely anaemic women.
4. providing 300 kcal as supplementary nutrition to children 1-6 years.
5. improve the nutrition and health status of adolescent girls.
Which of the following statements is incorrect?  (1) The Oceanic crust is thinner as compared to the continental crust. (2) Topmost layer of the Mantle is known as the Asthenosphere. (3) The density of the outer core is higher than that of the inner core. (4) The core is made up of heavy materials like Iron and Nickel.