Frequency of a wave and capacitance

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SUMMARY

The discussion centers on the relationship between capacitance and the frequency of electromagnetic waves emitted during the discharge of a capacitor. It is established that a capacitor does not emit noticeable electromagnetic waves when discharging slowly through leakage. However, a rapid discharge, such as shorting the leads, can produce electromagnetic waves, which can be detected by an AM radio. The size of the capacitor, measured in Farads, influences the energy stored but does not directly affect the frequency of the emitted waves.

PREREQUISITES
  • Understanding of capacitor discharge mechanisms
  • Knowledge of electromagnetic wave generation
  • Familiarity with Farads as a unit of capacitance
  • Basic principles of radio frequency detection
NEXT STEPS
  • Research the effects of capacitor discharge rates on electromagnetic wave emission
  • Explore the relationship between capacitance and energy storage in capacitors
  • Learn about the principles of radio frequency interference and detection
  • Investigate practical experiments involving capacitor discharges and EM wave detection
USEFUL FOR

Electronics enthusiasts, electrical engineers, and students studying capacitor behavior and electromagnetic theory will benefit from this discussion.

chamsy
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Hi,

I have read that as a capacitor discharges, it emits electromegnetic waves. Plz tell me does the frequency of these waves increase as the capacitance of the capacitor increases.

Thanks a lot,
Chamal.
 
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Originally posted by chamsy
Hi,

I have read that as a capacitor discharges, it emits electromegnetic waves. Plz tell me does the frequency of these waves increase as the capacitance of the capacitor increases.

Thanks a lot,
Chamal.

I think that what you stated pretty much is an example of a little knowledge can be a dangerous thing. There are MANY things that can happen when a capacitor discharges. It just depends on HOW it discharges. On its own, a capacitor discharging slowly through its own leakage will not emit any noticeable EM waves. Take a capacitor and charge it, then quickly discharge it by shorting it leads, then yes, it will emit EM waves because of the arcing. It can easily be proven by doing this next to an AM radio. You will hear it in the speaker.
 
One thing average didn't answer was the capacity question. The larger the capacitor ( in terms of Farads ) is the more energy it stores.This tho has no baring on the question of Fq
 

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