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Sunday 28th August 2016
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Why do car key fobs work better if they're by your head?


key.jpgIf you’re out of range, your car key fob button won’t work, but if you put it to your head, it does work. Why?
Dave, Chelsea


** Definitive **
Name: Colin, Stamford Hill
Qualification: Electronics City and Guilds
Answer: When you put the transmitter against the body, the body acts like an amplifier and amplifies the RF (radio frequency wave) signal towards the car. The fluid in the body transmits the signal as your body acts like an aerial. Like when you made a crystal radio when you were younger and it worked better by the radiator.

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