A voltage follower is an op-amp circuit that has a voltage gain of one. It's also referred to as an isolation amplifier, a buffer amplifier and a unity-gain amplifier. The op-amp doesn't provide any amplification to the ... More »

VAC is an electrical voltage in an alternating current circuit. The power system supplying homes and businesses in the United States uses AC 120 V, while in Europe the system uses AC 240 V. More »

Kirchhoff's loop rule states that the sum of the potential drops around a closed loop in a circuit is equal to the voltage supplied to the loop. This rule arises from conservation of energy, which states that energy cann... More »

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A transformer changes the voltage of an electric current while transferring it from one circuit to another through electromagnetic induction. Fluctuating magnetic fields in the transformer generate an electric current in... More »

The difference is that a current traveling through a circuit flows constantly through conductors, typically in a low voltage but at a high rate of current. A static discharge is high voltage but low current, and occurs d... More »

A voltage regulator is an electromechanical component used to maintain a steady output of volts in a circuit. It does this by generating a precise output voltage of a preset magnitude that stays constant despite changes ... More »

Some of the basics of electrical engineering are current, voltage and resistance. These are three of the essential building blocks of electricity, and it is important to understand electricity at a fundamental level befo... More »