Using a VGA cable for a 100-meter length is generally not recommended due to signal degradation over long distances. VGA signals can suffer from loss of quality and interference, leading to poor video performance. If you need to transmit video over such a distance, consider using a signal booster, active VGA extender, or an alternative solution like HDMI over Ethernet or fiber optics for better reliability.
Would probably depend upon the gauge of the cable, the type of metal used to conduct the electricity, what kind of shielding/jacketing around the wire, and how many breaks there are in the cable i.e. crimped butt connectors if applicable.
An ethernet cable is used in computer and internet connections and is available in different lengths and is also called an Ethernet Cable
That would probably depend on the specific technology, but in the case of UTP or STP, the length limitation is 100 meters.
A cable that links a PC to a TV is often referred to as a VGA/HDMI cable. These cables can be purchased at various lengths from all good electronics stores, such as Amazon.
BNC connector
what type of cable would you used to create a ring topology?
Coaxial, RG-59.
Ethernet cable is typically 8-core category 5 (CAT5) cable with RJ45 plugs on each end, capable of bi-directional network transmission up to 100m. CAT5e and CAT6 are better quality cable for network communications over longer distances.
The first variety is UTP or unshielded twisted pair, often used in LAN's with maximum cable length of 100m. The second one is STP or shielded twisted pair, extensively used for telephones.
decameter (though this is not widely used)
That depends on waht the instrument is and is being used for and what is being carried in the electrical cable. If the electrical cable is carrying DC, there is not much to worry about unless the current is very high. AC/modulated current in the electrical current will induce currents in the instrument cable but how great the problem will be depends on current and frequency. Normally, a few inches separation would be enough. If there is likely to be a significant probelm it would be normal to used screened cable for one or both.
The VGA cable that you would use to connect a laptop to a projector screen is called a PS2 projector cable.