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Is there a review about LF-EMF that mention the different used devices that generate EMF? 


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A review on low-frequency electromagnetic fields (LF-EMF) discusses various devices generating EMFs. The study highlights that exposure to EMFs is influenced by wireless technologies like WLAN, GSM, and UMTS, with different services affecting individual EMF exposure levels. Additionally, the review emphasizes the importance of exposure assessment studies in classifying population exposure categories for future risk analysis, crucial for health risk assessments related to EMF exposure. Furthermore, the review underscores the need for understanding the impact of different LF-EMF features on neuronal activity, showcasing the effects of LF-EMF forms and time intervals on long-term potentiation experiments. This comprehensive review provides insights into the diverse sources and effects of EMFs, shedding light on the complexities of EMF exposure and its implications on health risk assessments.

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Yes, the review mentions various devices generating EMF, including hair dryers, electric shavers, induction cookers, compact fluorescent lamps, inductive charging systems for electric cars, and security devices.
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Where does back emf come from for DC motor?3 answersBack EMF for a DC motor is generated due to the interaction between the magnetic field produced by the rotor and the stator windings. When the rotor rotates, it induces a voltage in the stator windings, which is known as the back EMF. This back EMF is proportional to the speed of the motor and opposes the applied voltage, resulting in a decrease in the current flowing through the motor. The back EMF can be detected using various techniques, such as hall effect sensors or back EMF sensing. In the case of brushless DC (BLDC) motors, back EMF sensing is a commonly used technique for sensorless control. It allows for the estimation of the rotor position and speed without the need for additional sensors.
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