An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave.
Elasticity of supply measures how the amount of a good changes when the producer hires more employees. Elasticity of supply measures how the amount of a good changes when the producer uses new materials. Elasticity of demand measures how the amount of a good changes when its price goes up or down. Elasticity of demand measures how the amount of a good changes when its distribution expands.
The price elasticity of demand measures how the quantity demanded of a good or service changes as its price changes. It is determined by a number of factors, including the necessity of the product, the availability of close substitutes, the proportion of income devoted to the product, and the relevant time horizon.