Why is a universal motor used in a mixer ?

A universal motor is commonly used in mixers due to its ability to operate effectively across a wide range of speeds and its high starting torque. Mixers require motors that can handle varying loads and speeds as they mix different ingredients. Universal motors excel in this application because they can be easily controlled to provide … Read more

What is the selection procedure of Ntpc to after gate ?

The selection procedure for NTPC (National Thermal Power Corporation) through GATE typically involves several stages designed to evaluate and select candidates for various engineering positions. Initially, candidates must qualify in the GATE (Graduate Aptitude Test in Engineering) examination conducted by the Indian Institutes of Technology (IITs) or IISc Bangalore. NTPC then releases a recruitment notification … Read more

What is the impedance of a diode ?

The impedance of a diode refers to its dynamic resistance or small-signal resistance when it is forward biased and conducting current. This impedance is not constant but varies with the operating point of the diode, particularly with the forward voltage across it. At low frequencies or small signal conditions, the impedance of a diode can … Read more

Where does the reverse current go in a generator ?

In a generator, the reverse current refers to the situation where electrical current flows back into the generator from the load or the electrical grid. Normally, generators are designed to produce electrical power and deliver it to the connected load or the electrical grid. However, under certain conditions, such as during faults or when the … Read more

What is a resistor and how does it work?

A resistor is a fundamental electrical component designed to restrict the flow of electric current in a circuit. It works by converting electrical energy into heat energy when current passes through it. This property arises from the resistor’s material composition, which offers a specific level of electrical resistance. Resistance is measured in ohms (Ω), and … Read more

What is the use of optical memristor ?

The use of optical memristors lies in their potential for advanced computing and memory applications. Optical memristors combine the characteristics of traditional memristors with photonics, allowing for data processing and storage using both electrical and optical signals. These devices can potentially offer high-speed operation, low energy consumption, and integration with existing photonics technologies. Applications include … Read more

How to fix a generator that has an old gas in it ?

Using old gas in a generator can lead to various operational issues, especially if the gas has degraded over time. Gasoline tends to deteriorate due to oxidation and evaporation of volatile components, which can result in the formation of gums and varnishes that clog fuel filters, carburetor jets, and fuel lines. When old gas is … Read more

Why is an alloy of lead and tin used in a fuse wire ?

An alloy of lead and tin, often called lead-tin alloy or lead-tin solder, is commonly used in fuse wires due to its specific melting characteristics. In a fuse, the wire is designed to melt and break the circuit when excessive current flows through it, thereby protecting the circuit components from damage caused by overcurrent conditions. … Read more

What is transferring resistance in reference to a transistor ?

Transferring resistance in reference to a transistor refers to the change in the output voltage or current resulting from a change in the input voltage or current. In a transistor, transferring resistance, also known as small-signal resistance or dynamic resistance, describes how the transistor amplifies or modifies signals. It quantifies how much the output signal … Read more