For definition of magnetic induction take a magnetic needle, attach it to a tortional dynamometer and measure force with which she will be out of balance, rotating dynamometer thread. Then achieve that the similar indicator was in interaction of an arrow with the solenoid, calculate its induction of magnetic field, it will be equal to required. Or bring the sensor of a teslametr in the necessary point of the field, and it will show value of magnetic induction in Teslas. For the solenoid the magnetic field can be calculated.
It is required to you
- For definition of induction of magnetic field take the solenoid, the conductor, millivoltmetr, a magnetic needle, teslametr.
Instruction
1. Measurement of magnetic induction of the field of the solenoid Take the solenoid (rather long coil of the isolated wire in which the field will have straight-line characteristics). Measure its length and express it in meters, then count quantity of rounds of the solenoid. Collect a chain where consistently turn on the ampermeter and the solenoid. Connect a chain to a source of current and take readings of current from the ampermeter in amperes. After that increase numerical value of current by quantity of rounds of the solenoid and divide into its length. Increase the received number by 1.26*10-6. As a result receive inductionmagneticfield in Teslas.
2. Measurement of induction of magnetic field by method of comparison with a standard Take a long magnetic needle in the form of a needle, and fix it on a sensitive tortional dynamometer. After that accurately bring it in the necessary point of magnetic field. It will orient under the influence of magnetic force. After that begin to rotate a dynamometer until the arrow does not leave equilibrium state. Write down indications of a dynamometer at the time of an arrow exit from position of balance. After that repeat this sequence of actions, bringing an arrow, by one of the ends of the solenoid. Regulating current tension of a source or a rheostat, achieve that arrow exit force from position of balance was equal measured earlier. Calculate magnetic induction of the field of the solenoid, using the previous point, its value will be equally required.
3. Measurement of induction of magnetic field by means of the direct conductor Podklyuchite the direct conductor to a millivoltmetr. Then measure its length in meters and place between poles of a permanent horseshoe magnet. Moving it with a constant speed, take readings of a millivoltmetr in volts. Then divide indications of the voltmeter into the speed of the conductor measured in meters per second and length of the conductor. Receive induction of magnetic field in Teslas.
4. Measurement of induction of magnetic field teslametry Bring the sensor of a teslametr in the necessary point of magnetic field. On the screen or a scale the value of magnetic field in this point will appear.