Electromagnetics wireless transmission of Energy

AI Thread Summary
The discussion centers on the efficiency of wireless energy transmission between two LC circuits tuned to the same resonant frequency. It is clarified that, under ideal conditions, the second coil will not receive all the power from the first due to the spreading of the transmitted field, which follows the inverse-square law. Misinformation about wireless energy transmission is highlighted, emphasizing skepticism towards popular sources like YouTube. The importance of resonant circuits in concentrating the field on the receiving coil is acknowledged, but the overall conclusion remains that not all energy will be captured. The thread concludes with a confirmation that the original poster has received their answer.
bocchesegiacomo
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There is an LC resonant tank connected at a power source at the resonant frequency and far away from it there is Another LC circuit with the same resonant frequency connected to a multimeter.
Assuming that there is no resistance and that all components are ideal the second coil will receive all the power radiated from the first coil?
 
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Is this homework?

If you describes one of those tanks as a radio transmitter and the other one as a radio receiver, what would you say the answer is?
 
bocchesegiacomo said:
There is an LC resonant tank connected at a power source at the resonant frequency and far away from it there is Another LC circuit with the same resonant frequency connected to a multimeter.
Assuming that there is no resistance and that all components are ideal the second coil will receive all the power radiated from the first coil?
Of course not. The transmitted field is spread throughout space. Use the inverse-square law and ratio by the receive coil area.

Don't believe everything you read about wireless energy transmission (there is much more misinformation than good information about it), and don't believe what you see on YouTube.
 
berkeman said:
Of course not. The transmitted field is spread throughout space. Use the inverse-square law and ratio by the receive coil area.

Don't believe everything you read about wireless energy transmission (there is much more misinformation than good information about it), and don't believe what you see on YouTube.
But if there is a resonant circuit the field concentrates on the receiving coil
 
anorlunda said:
Is this homework?

If you describes one of those tanks as a radio transmitter and the other one as a radio receiver, what would you say the answer is?
I don't know
 
bocchesegiacomo said:
But if there is a resonant circuit the field concentrates on the receiving coil

bocchesegiacomo said:
I don't know

It sounds like you don't understand the answer that @berkeman gave you. He's correct.
 
The OP has his answer. Thread Closed.
 

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