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sid_galt
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Does EM wave have to actually strike a surface to induce current or can the EM fields induce current from a distance?
EM waves are a form of electromagnetic radiation that consist of electric and magnetic fields oscillating perpendicular to each other. When these waves encounter a conductor, such as a wire, the changing electric and magnetic fields can induce a current to flow through the wire. This is known as electromagnetic induction.
The strength of the induced current depends on several factors, including the frequency and amplitude of the EM wave, the distance between the conductor and the source of the wave, and the properties of the conductor itself (such as its conductivity and length).
Yes, an EM wave can induce a current in a vacuum. This is because the electric and magnetic fields of the wave are able to interact with charged particles, such as electrons, even in the absence of a medium like air or water.
Yes, the induced current can be controlled and directed by using various electronic components, such as capacitors and inductors, to manipulate the properties of the conductor and the EM wave. This is the basis for technologies such as wireless power transfer and radio communication.
Yes, there can be potential dangers associated with EM waves inducing current at a distance. For example, high frequency EM waves can produce enough energy to induce strong currents in the human body, which can be harmful. It is important to properly shield and protect against such waves to prevent any potential harm.