Electromagnetism is the branch of physics that studies the interactions between electrically charged particles and the resulting magnetic fields.
Two wires carrying electric currents in the same direction will attract each other, while two wires carrying electric currents in opposite directions will repel each other due to the interaction between their magnetic fields.
The strength of an electromagnetic field depends on the magnitude of the electric current, the distance between the wires, and the material properties of the wires such as their conductivity and permeability.
Yes, an electromagnetic field can be shielded by using materials that are good conductors, such as copper or aluminum, to create a barrier between the source of the field and the area that needs to be shielded.
Electromagnetism has many practical applications in our daily lives, such as in electrical and electronic devices, motors, generators, and power transmission. It is also used in medical imaging technologies like MRI and in communication systems like radios and cell phones.