You will need
- conventional radio, flat screwdriver, hand analyzer electromagnetic field.
Improvised "catcher" electromagnetic radiation is a conventional radio receiver, preferably something of the cheapest models. They react to electromagnetic interference. To the antenna of such a receiver fasten a loop of wire or wire (with a radius of not less than 20 centimetres), rebuild the radio to a frequency where no broadcast and walk around the house, listen to how to change the sound. Where distortion is most clearly audible, there is electromagnetic radiation is stronger.
You can try to make the process of locating strong magnetic fields more visible. Go to a major electronics store and ask them flat screwdriver. There are two types of screwdrivers, take one which has an led and three small batteries. Usually they burn red. House hold a screwdriver to any enabled device, swipe along the wires (even if they are mounted in the wall) – the more intense the light from the screwdriver, the stronger the electromagnetic radiation.
So how to measure electromagnetic radiation in the numbers of improvised means impossible, then used a special device. If your friends work for companies on labour protection, certification or service of the state, you can try to ask them for a special device, which will show you the magnetic field. It is called a manual analyzer electromagnetic field. The device is able to measure the level of electromagnetic radiation the most common frequencies. Switch on the appliance and put in the tracking mode the desired frequency. So how to keep track of all the readings simultaneously, set the mode of recording the measurement results, then view them on the computer. Units of radiation measurement are also set independently from the usual "volts per meter" to "microwatt per centimetre square".
Remember that electromagnetic radiation is harmful to the human body and should be avoided.
Using any of the above ways, you'll find the most "dangerous" places in your apartment.
Advice 2 : How to measure electromagnetic field
Measurement of the electromagnetic field are carried out in two directions. First, find its frequency using the Hertz dipole or resonant circuit. To do this, tune them in resonance with an external electromagnetic field and calculate their own frequency. The second is its intensity. For rough measurements of the intensity of use an inductor (solenoid). For a more accurate – special devices.
You will need
- vibrator Hertz
- - resonant circuit with the possibility of changing the settings,
- - copper wire,
- - iron core,
- - a set of devices for measuring magnetic and electric fields.
The determination of the frequency of the electromagnetic field Take the Hertz dipole. This is a copper rod, with balls at the ends, in the gap which is inserted a Ruhmkorff coil (two windings on one core). If you make it to the electromagnetic field, adjust the clearance of the rod, yet it does not begin to slip sparks. With reference to these parameters, find the frequency of this vibrator, it will be the frequency of the external electromagnetic field.
In the second case, take a resonant circuit with a coil of small inductance and a capacitor of large capacitance. Included in this resonant circuit the ammeter, and (by changing its parameters, for example, increasing or decreasing capacity) measure, at what values it is the most current. It will be observed from the coincidence of the natural frequency of the loop oscillation frequency of the electromagnetic field. This technique is used in radios, and therefore you can take the path with them. Devices measure the inductance of the coil and the capacitance of the capacitor in which there is resonance, then from the product of inductance and capacitance extract the square root and then multiply the result by the number of 6.28. The number 1 divide by the result of calculations. The result will be the frequency of the external electromagnetic field in Hertz.
Determination of the intensity of the electromagnetic field If it is known that at a given point of space is the electromagnetic field, take a copper wire of large cross-section with a length of about 1 m, wrap it into a solenoid (a few isolated threads) and the leads (the ends of the conductor), connect the voltmeter. An alternating magnetic field, which is a component of an electromagnetic field, excite in the conductor EMF, measure it with a voltmeter. The more indications of the voltmeter, the more intense the field. Special gauges of the magnetic field can define its intensity in different frequency bands. Make a sensor device in the field on the screen will appear the options.