Why does a metal detector decrease inductance?

the permeability is decreased due to Eddy currents induced in non ferrous objects. The alternating magnetic field creates small currents in these objects, which in turn produce a magnetic field which opposes to the original field. In that case, inductance is decreased.

How can inductance be reduced?

Methods to reduce the effect of Inductive Coupling Between Cable and Ground Loop

1. Decrease the cable height (h) and length.
2. Whenever possible place the cable near the metal surface.
3. Use twisted cables.
4. On high frequencies ground the shield at two points (be careful) and on low frequencies at a single point.

What are the physical factors that affect the inductance of an inductor?

What are the factors that affect inductance?

• Number of Wire Turns in the Coil. The greater the number of turns of wire in the coil, the greater the inductance.
• Coil Area. The greater the coil area, the greater the inductance.
• Core Material.
• Coil Length.

How do you increase the inductance of an inductor?

As well as increasing the number of coil turns, we can also increase inductance by increasing the coils diameter or making the core longer. In both cases more wire is required to construct the coil and therefore, more lines of force exists to produce the required back emf.

What is inductor inductance?

Inductance is the ability of an inductor to store energy and it does this in the magnetic field that is created by the flow of electrical current. Typically coils of wire are used as a coil increases the coupling of the magnetic field and increases the effect.

How does length affect inductance?

All other factors being equal, the longer the coil’s length, the less inductance; the shorter the coil’s length, the greater the inductance. Explanation: A longer path for the magnetic field flux to take results in more opposition to the formation of that flux for any given amount of field force (amp-turns).

Why do we need inductors?

In power supplies, an inductor’s role is to prevent sudden changes in current used. Working alongside a capacitor, an inductor prevents sudden changes in the power supply’s output voltage and current. Overall, they’re very simple components that play a critical role in power electronics.

How does inductance effect current?

The effect of an inductor in a circuit is to oppose changes in current through it by developing a voltage across it proportional to the rate of change of the current. An ideal inductor would offer no resistance to a constant direct current; however, only superconducting inductors have truly zero electrical resistance.