body capacitance การใช้

• "' Body capacitance "'refers to the physical property of the human body that has it act as a capacitor.
• A neon lamp takes very little current to light, and thus can use the user's body capacitance to earth ground to complete the circuit.
• However, body capacitance is very useful in the Theremin, a musical instrument in which it causes slight frequency shifts of the instrument's internal oscillators.
• Devices like touch-sensitive switches, touch-on-off lamps, and doorknob-touch detectors, all claim they work on the principle of body capacitance.
• Body capacitance was a significant nuisance when tuning the earliest radios; touching a tuning knob would couple the body capacitance into the tuning circuit, slightly changing its resonant frequency.
• Body capacitance was a significant nuisance when tuning the earliest radios; touching a tuning knob would couple the body capacitance into the tuning circuit, slightly changing its resonant frequency.
• The interaction with the medium ( e . g . body capacitance ) can cause energy to deflect back to the source, as occurs in the " reactive " near field.
• The human body is a great charge-holding object ( capacitor ) ( this biological property is called body capacitance ), and sensitive capacitive detectors can be made to function as proximity detectors.
• Notably, a combination of footwear with some sole materials, low humidity, and a dry carpet ( synthetic fiber in particular ) can cause footsteps to charge a person's body capacitance to as much as a few tens of kilovolts with respect to the earth.
• However, human body capacitance is only about 100pF, which at 60Hz produces a capacitive reactance of about 25M?, which at 120V results in a current of about 5礎, which is about 200 times smaller than the talk ) 06 : 58, 25 April 2013 ( UTC)