Electromagnetic induction is a phenomenon in physics where a changing magnetic field induces an electromotive force (EMF) or voltage in a conductor. This phenomenon is described by Faraday's law of electromagnetic induction. When the magnetic flux through a closed loop of wire changes over time, an EMF is induced in the wire. The direction of the induced EMF and current depends on the rate and direction of change of the magnetic field.
When you mention "parallel aiding" in the context of electromagnetic induction, you're likely referring to the orientation of two or more parallel conductors carrying currents in the same direction. In this situation, the magnetic fields produced by each current aid or reinforce each other, leading to enhanced electromagnetic effects.
Here's a more detailed explanation:
Current-Carrying Conductors: Imagine you have two parallel conductors carrying electric currents in the same direction. The electrons in the wires are in motion, creating a magnetic field around each conductor according to Ampère's law.
Magnetic Fields: Each current generates its own magnetic field. These magnetic fields interact with each other due to their proximity and parallel arrangement.
Aiding Magnetic Fields: In the case of parallel aiding currents, the magnetic fields produced by each current add up or reinforce each other in the region between the conductors. This results in a stronger combined magnetic field between the conductors than what each individual conductor would produce on its own.
Enhanced Electromagnetic Induction: If there is a change in the magnetic flux through this combined magnetic field, such as when an external magnetic field changes or when the currents in the conductors change, a larger induced EMF will be generated in the conductors compared to the situation where the currents were not aiding each other.
Applications: Parallel aiding currents and the enhanced electromagnetic effects they produce are used in various applications. One common example is the transformer, where primary and secondary coils are wound around a common core. When currents flow in the primary coil, they create a changing magnetic field that induces a voltage in the secondary coil due to their aiding magnetic fields.
Remember that the direction of the induced current in the secondary coil will depend on the orientation of the coils and the relative direction of the currents. The concept of aiding currents is important in understanding how electromagnetic induction works and how it's utilized in various devices and technologies.