A flower-shaped structure only a few micrometers in size made of a nickel-iron alloy can concentrate and locally enhance ...

How a tokamak works: The electric field induced by a transformer drives a current ... into a circle prevents leakage and doing this inside a doughnut-shaped vessel creates a vacuum. The other magnetic ...

When an electric current flows, the shape of the magnetic field is very similar to the field of a bar magnet. The field inside a solenoid is strong and uniform. The small magnetic field caused by ...

the strength of the magnetic field increases; the length of wire inside the magnetic field is increased. The force is always greatest when the direction of the current is 90° to the direction of ...