Measurement of frequency requires the number of fluctuations or whole revolutions of a body (at rotary motion) to divide into time for which they occur. At measurement of frequency of an oscillatory contour or alternating current use other methods of measurement and calculation.
It is required to you
- stop watch and electronic tester
Instruction
1. Measurements of frequency mechanical to a kolebaniyponablyudayta behind mechanical oscillating motion, and visually define a point where one kolebatelno movement comes to an end and another begins. Take better one of balance points which are in any oscillating motion. For example, if cargo fluctuates on a spring, take extreme top or extreme lower situation for such point. Then count some number of fluctuations, at the same time note time for which they happen, by means of a stop watch. Then, the received number of fluctuations, divide into time for which they happened, measured in seconds. As a result receive the frequency of fluctuations in Hertz. At measurement of frequency of rotation of a body the same principle, only instead of fluctuations is counted quantity of whole revolutions of a body.
2. Measurement of frequency of an oscillatory contour to measure the frequency of an oscillatory contour which consists of the condenser and the coil of inductance learn values of capacity of the condenser and inductance of the coil. If the capacity and inductance are unknown in advance, measure them by an electronic tester. For this purpose choose the corresponding settings on it and attach a tester serially to the coil and the condenser, having taken readings. Measure inductance in Henry, and capacity in Farads. Measured sizes multiply and take a square root from the received number. Increase that number which turned out by 6.28. Then divide number 1 into calculation result. As a result receive the frequency of an oscillatory contour.
3. Measurement of frequency of alternating current to measure the frequency of alternating current take an electronic (digital) tester, tune into measurement of frequency the special switch on its case and attach to a current source. On the screen you will instantly see the frequency of alternating current in a chain in Hertz or multiple sizes.