This magnetic field can be made to fill an entire house by running one turn of copper wire around the house and driving it with the speaker output of a small transistor radio.
(This magnetic field; can be made; to fill an entire house by running one turn of copper wire around the house and driving it with the speaker output of a small transistor radio)
This magnetic field
can be made
to fill an entire house by running one turn of copper wire around the house and driving it with the speaker output of a small transistor radio