✅ Answers
Hi
The only real transmitter of a voltage is a radio transmitter. this AC signal is however small as it dissipates the further you are from the source by the square root law.
so even meters away the signals do become significantly small in value.
this was first demonstrated by tesla in his experiments.
when he tried to transmit power over the ether as he called it.
today we have the mobile phone mast which has been blamed for RF transmissions. however the radio masts being so high have very little effect on people and animals due to height and distance.
the main source of RF burns would be from the hand held device the phone which has the effect of cooking the grey matter of the brain when the mobile phone is placed next to the human head as
Microwave radiation is an accumulative heat source which gets worse over time hence the warm ear.
Source(s): so mobile phones should carry a government health warning as it does more damage than smoking cigarettes.
An operational amplifier transmits voltage (not far however). Nobody in industry transmits voltage for measuring sensor position, weight, etc. The devices use current, to mA, due to noise immunity. More modern sensors use wireless, Ethernet, modems, fiber optic etc.