Editing Inductive coupling (section)

==Low-frequency induction==
Low-frequency induction can be a dangerous form of inductive coupling when it happens inadvertently. For example, if a long-distance metal [[Pipeline transport|pipeline]] is installed along a [[Right-of-way (property access)|right of way]] in parallel with a high-voltage power line, the power line can induce current on the pipe. Since the pipe is a conductor, insulated by its protective coating from the earth, it acts as a secondary winding for a long, drawn out transformer whose primary winding is the power line. Voltages induced on the pipe are then a hazard to people operating valves or otherwise touching metal parts of the metal pipeline.{{citation needed|date=August 2019}}

Reducing low-frequency magnetic fields may be necessary when dealing with electronics, as sensitive circuits in close proximity to an instrument with a power transformer may pickup the [[mains frequency]]. [[Twisted pair|Twisted wires]] (e.g. in [[Networking cable#Twisted pair|networking cables]]) are an effective way of reducing the interference as signals induced in the successive twists cancel. [[Magnetic shielding]] is also an effective way of reducing unwanted inductive coupling, though moving the source of the magnetic field away from sensitive electronics is the simplest solution if possible.<ref>{{cite book |last1=Horowitz |first1=Paul |last2=Hill |first2=Winfield |title=The Art of Electronics Second Edition |date=1989 |publisher=Press Syndicate of the University of Caimbridge |isbn=0521370957 |page=456 }}</ref>

Although induced currents can be harmful, they can also be helpful. Electrical distribution line engineers use inductive coupling to tap power for cameras on towers and at substations that allow remote monitoring of the facilities. Using this they can watch from anywhere and not need to worry about changing camera batteries or solar panel maintenance.{{citation needed|date=August 2019}}