What is an armature coil?

State any four advantages of having stationary armature in case of three phase alternator.
Answer : In a three-phase alternator, having a stationary armature (i.e., the armature is fixed and the rotor rotates) provides several advantages: 1. **Simplified Design**: A stationary ... seen in machines with rotating armatures. This leads to lower maintenance requirements and longer operational life....

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in Electrical Engineering

Write the armature current and voltage relationship of a Separately excited DC Generator.

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in Electrical Engineering

What is the armature winding made up of and why?

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What type of material is used to make the armature core?

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What is the significance of lamination in the armature?

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What is the significance of air holes in the armature?

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What is meant by armature reaction in alternators?

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in Electrical Measurement & Instrumentation

Explain the working principle of a Moving Iron (MI) instrument. How does it differ from a Moving Coil (MC) instrument in terms of construction, operation, and applications?

Explain the working principle of a Moving Iron (MI) instrument. How does it differ from a Moving Coil (MC) instrument in terms of construction, operation, and applications?
Answer : **Working Principle of Moving Iron (MI) Instrument:** A Moving Iron (MI) instrument works on the principle of electromagnetic attraction. When current flows through a coil, it creates a magnetic field. This ... galvanometers and ammeters. Let me know if you'd like me to add or tweak anything!...

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What is the formula for a coil?

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What is the formula for coil galvanometer?

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What is the principle of A moving coil galvanometer?

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What are the two types of moving coil galvanometer?

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What is the SI unit of moving coil galvanometer?

What is the SI unit of moving coil galvanometer?
Answer : The SI unit of a moving coil galvanometer is the **ampere (A)**, since a moving coil galvanometer is primarily used to measure electric current. The instrument itself doesn't have a specific ... the readings from the galvanometer are typically in amperes, which is the SI unit of electric current....

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What is the principle of moving coil meter?

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What is the principle of moving coil instrument?

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Is moving coil galvanometer AC or DC?

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What is the working principle of moving coil galvanometer?

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What is the principle of operation of a voice coil motor?

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How does a rogowski coil measure electric current?

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How does a moving coil meter measure current?

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How does a ground fault neutralizer (Petersen coil) work?

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What is the purpose of a T-coil peaking network in broadband amplifiers?

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What is the purpose of a T-coil in high-speed circuits?

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How does a rogowski coil measure current?

How does a rogowski coil measure current?
Answer : A Rogowski coil is a type of current sensor that measures alternating current (AC) without making direct contact with the conductor carrying the current. It works based on the principle of ... for measuring AC in environments where direct contact with the conductor would be dangerous or impractical....

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in Electrical Engineering

Explain the working principle of a moving-coil loudspeaker.

Explain the working principle of a moving-coil loudspeaker.
Answer : A moving-coil loudspeaker works based on the principle of electromagnetism, where an electric current interacts with a magnetic field to produce motion. Here's how it works step by step: ### 1. **The ... faster the coil moves, the higher the pitch, and the larger the movement, the louder the sound....

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in Electrical Engineering

What is the purpose of a Rogowski coil in current measurement?

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What is the difference between a current transformer (CT) and a Rogowski coil?

What is the difference between a current transformer (CT) and a Rogowski coil?
Answer : A **Current Transformer (CT)** and a **Rogowski Coil** are both devices used to measure alternating current (AC), but they work in different ways and have distinct characteristics. Here's a ... to obtain the current value. Each has its own set of advantages depending on the specific application....

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in Electrical Engineering

How does a Rogowski coil current sensor work?

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in Electrical Engineering

How can you start-up the 40w tube lite with 230v AC/DC without using any choke/Coil?

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