# Query about induced voltage and open-circuit current

• Ohmer
In summary, when a wire is moved through a magnetic field, it experiences a magnetic force and an opposite force generated by the electric field. This leads to the generation of EMF or induced voltage. In a closed circuit, this causes current to flow, but in an open circuit, there is no load for the current to flow through. However, further down the wire where there is a load, there is a backup of charge carriers, causing a loss of power. The kinetic energy of the charge carriers is not significant, as the energy is primarily stored in the electric and magnetic fields. In the case of a single section of wire with open ends, there is no load for the current to flow through.
Ohmer
When we move a wire through a magnetic field appears a magnetic force that distributes loads at one end of the wire ( following equation F = q⋅(vxB) ), until an opposite force is generated on the wire by the electric field (E) caused by charge distribution.

This causes the EMF or induced voltage. When we close the circuit the current flows thanks to the electric field…but what happens when the circuit is open? in real generators the wires are coils in which a sinusoidal emf is induced, which means that charges flow sinusoidally from one end to another of the wire without load. If the intensity is dQ / dt through a section of the wire, why no intensity? has to do with the magnetic field does no work nor affect the kinetic energy of the electrons ? This shift in load distribution generates power losses?

Why is there no load? Although one section of wire may not have a load, somewhere down the wire there is a load (at least in a closed circuit). That load causes a backup of charge carriers, like a traffic jam. The backup goes all the way back to the section in the magnetic field which provides the motive force for the charge carriers.

BTW, the kinetic energy of the charge carriers is small. They typically move on the order of a few meters/second and have almost no mass. The energy is in the electric and magnetic fields (which "move" at the speed of light).

Jeff Rosenbury said:
Why is there no load?

because he is asking about a single bit of wire, with open ends

## What is induced voltage?

Induced voltage is the voltage that is created in a coil of wire when it is exposed to a changing magnetic field.

## How is induced voltage measured?

Induced voltage can be measured using a voltmeter or by calculating the change in magnetic flux over time.

## What is open-circuit current?

Open-circuit current is the current that flows through a circuit when there is no load attached to it. This current is also known as the idle current or no-load current.

## How is open-circuit current related to induced voltage?

The open-circuit current is directly proportional to the induced voltage. This means that as the induced voltage increases, the open-circuit current also increases.

## What is the significance of induced voltage and open-circuit current?

Induced voltage and open-circuit current are important concepts in understanding the relationship between magnetic fields and electrical currents. They are also essential in designing and optimizing electrical circuits and devices.

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