Electrostatic Force – Coulomb’s Law

The Electrostatic force is an attraction or a repulsion force. It depends on the charges and distance between them.

Electronics – Electrical Unit Definitions

Definitions of basic measurement units in electricity and electronics. Ampere (A), Coulomb (C), Joule (J), Watt (W), Farad (F), Henry (H), Ohm (Ω), Siemens (S), Volt (V), Hertz (Hz), Radian, Angular frequency (w), Time (t)

What is an Inductor? – Inductance – Units

Inductor stores energy in form of magnetic field due to the self-induction phenomenon. A cable where a current circulates, has on its surroundings a magnetic field.

RC High Pass Filter (passive High Pass filter)

An RC high pass filter allows only the passage of frequencies above the cut-off frequency (Fc) and eliminates frequencies above this frequency

The Superposition Theorem

The Superposition theorem states that the effect of two or more voltage sources in a resistor is equal to the sum of the individual effects of each source taken separately, replacing all the remaining voltage sources with short circuits.

What is Direct Current? – DC

Direct Current (DC), is the result of the flow of electrons (negative charge) in a conductor (most of the time, wires of copper) that goes only in one direction.

What is Electrical Resistance? Obtaining a material’s resistance

The electrical resistance is a measurement of the opposition that offers a material to the passage of electrons (the electric current). When a material, such as metals has many free electrons, it allows the easy flow of electrons and it is called conductor.

What is Joule’s Law?

It is known as Joule effect to the phenomenon by which if in a wire circulates an electrical current, part of the energy is transformed into heat. This law (Joule’s Law) is named after the British physicist James Prescott Joule.

Second Right-Hand Rule – Electromagnetism

Second Right-Hand Rule. When a current flows through a conductive wire a non-visible effect called the electromagnetic field is generated around it.

What is Electrical Resistivity?

Electrical resistivity [ρ] (rho) is a characteristic of materials and has ohm-meter unit. Resistivity indicates how much the material opposes the flow of electric current.

Why is there a diode connected in parallel to a relay coil?

The purpose of a diode connected in parallel to a relay coil (flywheel diode or freewheeling diode) is to avoid damaging some nearby components sensitive to high voltage.

How to test Diodes and how to test Transistors

Method to follow to to test a diode or transistor to know if they are working fine