For finding of the period of fluctuations take time for which there was a number of fluctuations and divide into this quantity. For definition of the period of fluctuations of the mathematical pendulum measure its length and calculate the period. For the spring pendulum define its rigidity and mass of cargo. To define the period of electromagnetic oscillations, find the capacity and inductance of a contour.
It is required to you
- stop watch, spring and mathematical pendulum, coil and condenser.
Instruction
1. The simplest way of definition of the period of fluctuations Take a stop watch and having included it, count a number of fluctuations. As a rule, from 10 to 30 pieces prluchatsya. Then divide time in seconds for which there were these fluctuations into their quantity. As a result receive value of the period in seconds.
2. Definition of the period of fluctuations of the mathematical pendulum Take the mathematical pendulum (a small body on long thread) and measure thread length in meters. Then this value divide length into number 9.81 take a square root from result, and increase the turned-out number by number 6.28. It will also be the period of fluctuations of the mathematical pendulum.
3. Definition of the period of fluctuations of the spring pendulum Measure the mass of cargo which will fluctuate on a spring. Then learn rigidity of a spring. If it is not known, take cargo and determine its weight (it will be equal in a motionless state to gravity) by a dynamometer, then suspend on a spring and by means of a ruler find its lengthening in meters. Then divide body weight into lengthening of a spring and receive its rigidity in newtons on meter. To find the period of fluctuations of the spring pendulum, divide the mass of cargo into rigidity of a spring, take a square root from the received number and increase it by 6.28.
4. Definition of the period of electromagnetic oscillations for this purpose find inductance of the coil and capacity of the condenser in an oscillatory contour. If they are not known, apply an electronic tester, having set the corresponding settings. Measure inductance in henry, and capacity in farads. After that multiply the received values of inductance and capacity, take a square root from number, and increase result by 6.28.