The phrase "magnetic fields in" is correct and usable in written English.
You can use this phrase to describe a particular area or region in which magnetic fields are present. For example, "The car was able to generate energy from the magnetic fields in the surrounding area."
While the designs of compasses are different, all compasses include a magnetized needle that orients itself to the magnetic fields in the Earth.
For each sample the data was collected at magnetic fields in the range of ±500 kA m 1 to determine the magnetization.
We know that space weather disturbances are strongly controlled by magnetic fields in the Sun's atmosphere.
Magnetograms map the strength and direction of the magnetic fields in the photosphere.
He is known also for his research in solar physics, particularly his discovery of magnetic fields in sunspots.
The magazine, Vi Bilagare, said it found magnetic fields in three Volvo models -- the S60, V70 and S80 -- as high as 17.8 microteslas around the driver's left foot.
Later, Dr. Babcock invented a device to measure magnetic fields in stars and created a "seeing monitor" to evaluate mountaintops as potential homes for telescopes.
He noticed that the expressions could be combined to form wave equations featuring the strength of the electric or magnetic fields in the place of "y".
Scientists had seen no signs of contemporary magnetic fields in data from Mars, leading them to write off the planet as geologically dead.
By 1864, the physicist James Clerk Maxwell had derived his four famous equations for the interactions of the electric and magnetic fields in a vacuum around charged particles.
This material was rapidly commercialized and is now used for generating high magnetic fields in research devices, magnetic resonance imaging (MRI) units, and electrical power-transmission lines.
