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"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 ..."

Magnetic field

Field of force in the vicinity of a permanent magnet or an electric circuit carrying current.