Electronics

Inductors are passive electronic components primarily designed to store energy in the form of a magnetic field when an electric current flows through them. They are not typically used to directly generate light like a light bulb or LED. Inductors do have the capability to generate electricity, but this occurs through a process of energy … Read more

Lightning strikes a lightning arrester (or surge arrester) because of its design and purpose in electrical systems. Lightning arresters are installed on structures to protect them from lightning strikes by providing a low-impedance path to ground for the lightning’s electrical energy. Lightning tends to strike the highest point or the path of least resistance to … Read more

To limit 12V DC at 5 amps, you can use an appropriate resistor or a constant current regulator. For resistors, Ohm’s law (V = IR) dictates that to drop 7V (12V – 5V) at 5 amps, you would need a resistor with a resistance of 1.4 ohms (R = V/I = 7V / 5A). However, … Read more

Preamps, amps (amplifiers), and receivers serve distinct purposes in audio systems, each playing a crucial role in signal processing and amplification, but they differ in their functionalities and applications. A preamp, short for preamplifier, is designed to amplify weak electrical signals from various audio sources such as microphones, turntables, or musical instruments to a level … Read more

Sound waves can stop traveling due to several factors that affect their propagation through a medium. One common reason is absorption. When sound waves encounter materials that absorb sound energy, such as soft surfaces or materials designed for sound insulation, the energy of the sound waves is converted into heat within the absorbing material. This … Read more

There are several devices used to change or adjust voltage levels in electrical and electronic systems, each serving specific purposes based on their design and application requirements. Voltage Transformer (Voltage Converter): A voltage transformer, also known as a voltage converter, is a device designed to change the voltage level from one value to another. It … Read more

The rotor of an induction motor rotates due to the principle of electromagnetic induction. When an alternating current (AC) is applied to the stator windings of the motor, it creates a rotating magnetic field. This rotating magnetic field induces currents, known as eddy currents, in the rotor conductors. According to Lenz’s law, these eddy currents … Read more

A humming sound on a transformer typically arises due to magnetostriction and electromagnetic forces acting within the transformer’s core and windings. Magnetostriction occurs when the magnetic field induced by the alternating current passing through the transformer causes the core material (often made of laminated steel) to expand and contract slightly. This mechanical movement generates vibrations … Read more

In homes, electrical circuits typically use a combination of series and parallel connections, depending on the application and the specific electrical devices involved. Series circuits involve connecting components one after another so that the same current flows through each component sequentially. However, series circuits are less common in home wiring for general power distribution due … Read more

A voltage source alone cannot generate a constant current directly because the current drawn from a voltage source depends on the load connected to it and Ohm’s Law (I = V/R), where I is current, V is voltage, and R is resistance. The current will vary depending on the load resistance; higher resistance results in … Read more