# Relationship between voltage and magnetic flux

### Voltage Current and Flux Relations Faraday and lenz's law of electromagnetic induction which states that change in flux due to a magnetic field induces an emf and current which produces a. This relates the rate of change of magnetic flux through a loop to the What is the connection between Faraday's law of induction and the magnetic force? Magnet moving toward the coil: Some voltage measured, rising to a peak as the. 1 Flux Linkage; 2 Faraday's Law; 3 Lenz's Law; 4 Questions. Flux Linkage. A magnetic field going through a coil of wire has a property known as flux linkage. So, a change in flux induces a current and a voltage which is proportional to.

Suppose the switch is briefly switched on then off. Qualitatively speaking, what will happen to the current measured in the neighbor? Current pulses due to induction between parallel wires. Solution When the switch is closed current begins to flow down through the left wire. This causes a magnetic field to build up around the wire and along its length according to the right-hand-grip rule.

Some of this field comes out of the page and intersects the right wire.

## What is magnetic flux?

The resulting change in flux causes a current to be briefly induced until the magnetic field stops changing. This current consists of a pulse which is maximized just when the switch is thrown because at this time the field is increasing at the maximum rate.

The current does not depend on the strength of the magnetic field, just the rate that it is changing. By Lenz's law, the direction of the current pulse in the right wire is opposite to that in the left wire. When the switch is opened again the process is repeated in reverse. Figure 6 show how the current in the two wires would change as a result of the switch opening and closing. What is a transformer? In the simplest form, a transformer is simply a pair of coils wound on the same core.

The core is often shaped as a square loop with primary and secondary coils wound on opposite sides. The construction of a transformer allows the magnetic flux generated by a current changing in one coil to induce a current in the neighboring coil. Construction of a typical transformer  Figure 8: Construction of a typical transformer  Large transformers are a key component of the electrical distribution system. They are especially useful because the number of turns on each coil does not need to be the same.

A loop that includes the effect of eddy currents is known as a dynamic hysteresis loop. Suppose that the resistance of the reactor winding is negligible. This is true for many iron-core reactors. Furthermore, let a sinusoidal voltage [] be applied to the reactor winding. The flux in the core will also be a sine wave as expressed by Eq. Generally, in iron-core reactors the leakage flux is small enough so that the flux in the core may be related to the voltage as in Eq. In case of a square voltage wave, the rms and average values are equal, and the form factor is unity.

FEC19A Voltage, Current, Flux and Charge Relationship

The form factor of a sine wave is 1. Waves of voltage, flux, and current in iron-core reactor with negligible resistance. The flux is plotted as a function of time in Fig. If the hysteresis loop could be represented by a straight line, the current would have the same wave form as the flux. However, this not being the case, the current cannot have the same wave form as the flux.

### What is magnetic flux? (article) | Khan Academy

The wave form of the current, if eddy current is neglected, is found graphically as follows. When the flux is zero and increasing, the instantaneous current is 1 on the hysteresis loop and is shown as 1 in Fig. When the flux is a and increasing, the current is 2 on the hysteresis loop.