Field of force in the vicinity of a permanent magnet or an electric circuit carrying current.
"I have just finished listening to a CD that was produced from a 78 rpm record created in 1954. The contents are songs performed by a quartet of Welsh singers, one of which was my father. It was the first time that I had heard the music that has been kept by my mother since it was first recorded. It was all the more meaningful to me because my ..."