The phrase "a physical connection" is correct and usable in written English.
It can be used to describe a tangible link or relationship between two entities, often in contexts related to technology, relationships, or physical objects.
Example: "The new device requires a physical connection to the computer for data transfer."
Alternatives: "a tangible link" or "a bodily connection".
Laser printers with built in wireless technology can connect to the network without a physical connection.
If they were going to marry, they needed more than a physical connection.
They help to transform our detached, ocular relationship with the man on screen into something like a physical connection.
There is a physical connection (a type of causal connection) between a thing-photographed and a photograph-of-that-thing.
According to Mr. Mandeberg, the Mirra comes with installed software that enables the server to integrate itself into a network automatically once a physical connection is established.
Move aside, sexting and phone sex, now you and your partner can have a physical connection from opposite sides of planet.
To his mind, a book, record or CD, more so than a screen or a download, forges a "physical connection with the process" of creativity.
I am a committed saver of mementos because they serve as a physical connection to my family that can be passed on to my children and grandchildren.
A physical connection (long-since subsided) had to have existed between mainland South America and the Galapagos, they argued, in order to account for presence of land-dwelling creatures like giant tortoises in the islands.
But on top of their desire to measure, I also suspect they wanted to touch and hold these pieces – to make a physical connection with the Hellenic world they idealised.
"Passing on" or "blocking" something suggests there is a physical connection between the two things, that inaction allows the Chancellor in London to set or influence the Scottish rate.
