What do you mean by Expansion and Contraction in Demand?

Law
We have studied under the law of demand that other things remaining the same, if price of a commodity rises, its demand decreases and if price of the commodity falls, its demand increases.When quantity demanded of a commodity increases as a result of the fall in the price, it is called extension (or expansion) in demand (a movement down the demand curve) and when the quantity demanded decreases as a result of an increase in the price of the commodity, it is called contraction in demand (a movement up the demand curve). Thus, extension and contraction in demand imply change in quantity demanded due to change in the price of the commodity, other things remaining the same. ADVERTISEMENTS: Extension in demand is shown in Fig. 1.7. At price OP1, OQ1…
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6 Important Ways for Disinfecting the Water Wells in India

Essays
Wells are the common sources of water supply in villages so they should be disinfected regularly to keep the water fit for drinking and domestic purposes.Previously potassium permanganate was used for disinfecting wells but now instead of potassium permanganate, bleaching powder is used for this purpose because it is cheap and quite effective disinfectant.For disinfecting the well following steps are involved: ADVERTISEMENTS: (i) Measurement of well for its depth.(ii) Amount of water in the well.(iii) Amount of bleaching powder required. ADVERTISEMENTS: (iv) Mixing of bleaching powder.(v) Addition of bleaching powder solution in the well.(vi) Ortho-toludine test. (i) Measurement of Well: First of all, the diameter of the well is measured and then its depth is measured in meters by a rope tied with some weight. The rope is lowered in…
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5 Important Techniques Used in Capital Budgeting–Notes

Accounting
A number of capital budgeting techniques that are used in practice are (Fig.24.1): 1. Pay Back Period Method: The payback period is the length of time required to recover the initial cash outlay of the project. It can be calculated as follows: ADVERTISEMENTS: Payback Period = Cash Outlay/Annual cash inflowThe method can be understood as follows:If a project involves a cash outlay of Rs. 1,50,000 and Rs. 2,00,000 in the first, second and third and fourth years respectively. It’s payback period is 4 years because the sum of cash inflows during 4 years is equal to the initial outlay. When the annual cash inflow is a constant sum, the payback period is simply the initial outlay divided by the annual cash inflows.For example, a project which has an initial cash…
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What are the different forms used to maintain Stock Records?

Accounting
Stock records are maintained in the following different forms:1. Bin card2. Stores ledger ADVERTISEMENTS: 3. Stock identification card4. Materials received note5. Materials requisition slip6. Materials returned slip ADVERTISEMENTS: 7. Materials transfer note8. Damage/shortage/excess report9. Daily receipt voucher10. Package slip. 1. Bin card: ADVERTISEMENTS: A bin card is said to be mirror of the bin which depicts the quantity materials stored therein. It tells the history of the bin. If functions as materials movement record and as a replenishment index. It is a brief version of the stock ledger pertaining to an item and serves the purpose of a ready reckoned for the item binned therein. The bin card serves the following purpose:(i) It is a check on the stock ledger recording.(ii) It helps in verifying the stock.(iii) It is a…
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5 Important Steps in Purchasing and Receiving Procedure of Materials

Accounting
Purchasing procedure varies with different business forms, but all of them follow a general pattern in the purchase and receipt of materials and payment of obligations. The important steps in purchasing and receiving procedure are as follows (Fig.9.1). STEP-I: Purchase Requisition: A form known as purchase requisition is commonly used as a formal request to the purchasing department to order goods or services. The purchase requisition serves three general purposes:1. It fixes the responsibility of the department/ personnel making the purchase requisition. ADVERTISEMENTS: 2. It can be used for future reference.3. It automatically starts the purchasing process and informs the purchasing department of the need for the purchase of materials.Usually, purchase requisitions are prepared by the storekeepers for regular stores items which are below or approaching the minimum level of…
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Essay on the Main Principles of Sri Aurobindo’s Educational Philosophy

Emotions
Shri Aurobindo Ghosh was deadly against the prevalent education of his times. He has admitted that after the attainment of independence, changes have occurred in our system of education, but it is not in conformity with the mental and spiritual needs of children and demands of the nation.According to him our education should be in accordance with the needs of our real modern life. Shri Aurobindo writes— “Education to be true must not be a machine made fabric, but a true building or living evocation of the powers of the mind and spirit of human being.” Aims of Education 1. Physical Development and Purity: The first aim of education is to achieve complete physical and pure development of a child. According to Aurobindo, it is the body which performs all…
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The Determination of Price and Output by a Competitive Firm in the Short-Run

Essays
The short run equilibrium is characterised by two basic features. First, the average and marginal cost curves are U-shaped. Second, entry or exit of firms is insignificant so that abnormal profits or losses persist in short run. The short run average and marginal cost curves, with their typical U-shapes caused by the inability of the firms to increase some of their fixed factors further, contribute to sustain abnormal profits or losses.They are denoted as SAC (short run average cost), SAVC (short run average variable cost) and SMC (short run marginal cost) instead of the general notation of AC, AVC and MC. Under these two features, the equilibrium of a competitive firm in short run, thus, may involve either abnormal profits or losses or even normal profits as shown in Figures…
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Difference between Price Elasticity, Income Elasticity and Cross Price Elasticity

Essays
Elasticity of demand is defined as the responsiveness of demand to a change in one of its determinants while the other determinants remain unchanged. Some of the elasticities axe defined below. 1. Price Elasticity: It is defined as the responsiveness of demand to a change in price, while other things remain unchanged. ADVERTISEMENTS: Price elasticity is measured as a ratio of the proportionate change in demand to a proportionate change in price. Thus, price elasticity of demand, Ep° is given aswhere, Q2 = quantity demanded at price P2 Ql = quantity demanded at price P1?Q = change in quantity demanded due to a change in price (?P) ADVERTISEMENTS: Q = initial level of demand at initial price PPrice elasticity will be discussed in detail later in the section. 2. Income…
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Difference between “Arc Price Elasticity” and “Point Price Elasticity” of Demand

Essays
Difference between “Arc Price Elasticity” and “Point Price Elasticity” of Demand are as follows: (i) Arc price elasticity: It is slightly different from the price elasticity as defined above. We have seen that price elasticity is given asHere, changes in demand and price are taken to be proportionate changes to their original levels, Q1 and P1 respectively. If the points are separated by a larger distance on the demand curve, it is customary to express the change in demand and price as a proportion of their average values rather than of their original values. (ii) Point price elasticity: Point price elasticity refers to the price elasticity at a point on the demand curve. In other words, it accounts for the price elasticity of demand in the close proximity of the…
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What are the Main Applications of Production Possibility Curve?

Industry
Any point on the PPC implies existence of full employment and full efficiency, but production of a combination below the PPC, at a point say A, implies existence of either unemployment or inefficiency. Refer to point A in Figure 1.3.Given full employment, it implies existence of inefficiency at point A. Alternatively, given full efficiency, the combination produced at this point implies existence of unemployment. The problems of unemployment and inefficiency can, thus, be investigated with the help of these curves. ADVERTISEMENTS: PPCs help to investigate the problems of growth and development also. In Figure 1.4, let FF be the production possibility curve for the year, say 2002 and let F’F’ be that for the year 2003. Since F’F’ is above FF at all levels of output of the two goods,…
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