Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

What is an Ideal OP Amp?An operational amplifier (OP Amp) is a direct current coupled voltage amplifier. That is, it increases the input voltage that passes through it. The input resistance of an OP amp should be high whereas the output resistance should be low. An OP amp should also have very high open loop gain. In an ideal OP amp, the input resistance and open loop gain is infinity whereas the output resistance is zero.An ideal OP amp has have following characteristics— Characteristic

Negative Feedback in Op AmpWe obtain Negative feedback in an op amp by connecting output terminal of an op amp to its inverting input terminal through a suitable resistance as shown below.The gain of an op amp with negative feedback is called closed loop gain.Closed Loop Gain of Op AmpWhen we connect a feedback resistance and a resistance in series with the inverting input terminal of an op-amp as shown in the above picture, the gain of the system just becomes the negative ratio of feedback resi

Anoperational amplifierorop ampis a DC coupled voltage amplifier with a very high voltage gain.Op amp is basically a multistage amplifier in which a number of amplifier stages are interconnected to each other in a very complicated manner. Its internal circuit consists of many transistors, FETs and resistors. All this occupies a very little space.So, it is packed in a small package and is available in the Integrated Circuit (IC) form. The term Op Amp is used to denote an amplifier which can be co

A linear amplifier like an op amp has many different applications. It has a high open loop gain, high input impedance and low output impedance. It has high common mode rejection ratio. Due to these favourable characteristics, it is used for different application. In this article, we are discussing some of the most prominent uses of an Op amp. This is not an exhaustive list but covers the important applications of op amp within the scope of our discussion.Op Amp applications as Inverting Amplifie

What is the definition of electrical engineering?Electrical engineering is a fundamental concept of mechanical physics and one of the most fundamental electrical interview questions that cover the study and application of electromagnetism and electricity in a variety of appliances. A.C. and D.C. are important concepts in electrical engineering. & D.C. Electric traction, current, transformers, and so on. What’s the difference between a capacitor, a resistor, and an inductor?Capacitor:A capac

What is the purpose of a lockout relay in high voltage?A lock-out relay is typically installed before or after the e-stop switch to allow electricity to be turned off from a single location. This relay is activated by a key lock switch and is powered by the same electrical source as the control power. Within the unit, the relay may contain up to 24 contact points. This enables the control power of several devices to be disabled with the flip of a single key switch. What is a reverse power relay

What effect does the overvoltage surge have on the electrical system?Over-voltage in the power system causes insulation failure in the equipment. It causes the line insulation to flash over and may potentially harm the surrounding transformer, generator, and other line-connected equipment. What does crawl in an induction motor mean?Induction motors, particularly squirrel cage induction motors, can occasionally run stably at speeds as low as one-seventh of their synchronous speed Ns. This phenom

What is an Op-Amp Integrator?An op-amp integrator is a circuit that uses an operational amplifier (op-amp) and a capacitor to perform the mathematical operation of integration. Integration is the process of finding the area under a curve or function over time. An op-amp integrator produces an output voltage that is proportional to the negative integral of the input voltage, meaning that the output voltage changes according to the duration and amplitude of the input voltage.An op-amp integrator c

What is the difference between Fuse and Breaker?A fuse contains a wire that melts when exposed to the heat of a short circuit or high current, therefore interrupting the circuit. You must replace it once it has melted.A circuit breaker cuts off the current without melting (for example, a pair of metal sheets having differing thermal expansion coefficients) and can be reset. What is aCircuit?Connections to the incoming wires are made inside the panel. These connections are then used to provide p

In RL parallel circuitresistor and inductor are connected in parallel with each other and this combination is supplied by a voltage source, Vin. The output voltage of circuit is Vout. Since the resistor and inductor are connected in parallel, the input voltage is equal to output voltage but the currents flowing in resistor and inductor are different.The parallel RL circuit is not used as filter for voltages because in this circuit, the output voltage is equal to input voltage and for this reason