Skip to content
Sitemap Privacy Policy
Electrical Classroom
  • Basics
    • Charge
    • Voltage
    • Current
    • Resistance
    • Capacitance
    • Inductance
    • Conductance
    • Power
    • Energy
    • Electromagnetic Induction
    • AC Basics
      • AC Basics
      • Real Power
      • Reactive Power
      • Complex and apparent Power
  • Circuit Theory
    • Electric Circuit
    • Series and Parallel Connections
    • Faraday’s law
    • Lenz’s law
    • Ohm’s Law
    • Kirchoff’s Laws
    • Voltage Division
    • Current Division
    • Thevenin’s Theorem
    • Norton’s Theorem
    • Maximum Power transfer theorem
    • Superposition theorem
  • Machines
    • Transformers
      • Transformer Action
      • Ideal Transformer
      • EMF equation
      • Equivalent circuit and Phasor diagram
      • Voltage regulation
      • Parts of a transformer
      • Transformer tresting
      • Load losses and No-load losses
      • Types
        • Core type and shell type transformers
      • Magnetization current
      • Magnetization inrush
      • High Leg delta connection
      • Buchholz relay
      • Autotransformer
      • Selection
        • Frequently asked questions-1
        • Frequently asked questions-2
        • Frequently asked questions-3
      • Transformer noise
      • Transformer kVA calculator
      • Transformer turns ratio
    • Instrument transformers
      • Potential transformers
      • Current transformers (CT)
      • CT v/s PT
  • Power system
  • Switchgears
  • Q&A
  • Articles
  • Tools
Menu Close
  • Basics
    • Charge
    • Voltage
    • Current
    • Resistance
    • Capacitance
    • Inductance
    • Conductance
    • Power
    • Energy
    • Electromagnetic Induction
    • AC Basics
      • AC Basics
      • Real Power
      • Reactive Power
      • Complex and apparent Power
  • Circuit Theory
    • Electric Circuit
    • Series and Parallel Connections
    • Faraday’s law
    • Lenz’s law
    • Ohm’s Law
    • Kirchoff’s Laws
    • Voltage Division
    • Current Division
    • Thevenin’s Theorem
    • Norton’s Theorem
    • Maximum Power transfer theorem
    • Superposition theorem
  • Machines
    • Transformers
      • Transformer Action
      • Ideal Transformer
      • EMF equation
      • Equivalent circuit and Phasor diagram
      • Voltage regulation
      • Parts of a transformer
      • Transformer tresting
      • Load losses and No-load losses
      • Types
        • Core type and shell type transformers
      • Magnetization current
      • Magnetization inrush
      • High Leg delta connection
      • Buchholz relay
      • Autotransformer
      • Selection
        • Frequently asked questions-1
        • Frequently asked questions-2
        • Frequently asked questions-3
      • Transformer noise
      • Transformer kVA calculator
      • Transformer turns ratio
    • Instrument transformers
      • Potential transformers
      • Current transformers (CT)
      • CT v/s PT
  • Power system
  • Switchgears
  • Q&A
  • Articles
  • Tools

Neutral-to-Earth/ground Voltage- Causes, effects, and solution

Image source: electronics.stackexchange.com Ideally, the voltage measured across the neutral and the earth/ground must be zero. But sometimes there exists some measure of potential difference between them. Here, in this…

Continue ReadingNeutral-to-Earth/ground Voltage- Causes, effects, and solution

Difference between grounding/earthing and bonding

Earthing and bonding are two terms very closely related but are different. Even though earthing and bonding are meant to prevent electric shock, they have a subtle difference that needs…

Continue ReadingDifference between grounding/earthing and bonding

Electric current collectors

What are current collectors? Current collectors are components fitted to an electric equipment in motion to collect electric current required for its operation from a stationary busbar. They can be…

Continue ReadingElectric current collectors

Interview questions on PLC (Programmable Logic Controllers)

Here are the most frequently asked Interview questions on PLC. This article aims to cover most of the interview questions on programmable logic controllers so as to prepare you to…

Continue ReadingInterview questions on PLC (Programmable Logic Controllers)

Interview question – Induction Motors

Here are the most frequently asked questions on Induction motors. This article aims to cover most of the interview questions on induction motors so as to prepare you to crack…

Continue ReadingInterview question – Induction Motors

Difference between Transistors and Thyristors

Transistors and thyristors are semiconductors switching devices. They are used for controlling current flow in circuits. They play a very important role in all power conversion devices. In this article…

Continue ReadingDifference between Transistors and Thyristors

The difference between kVA and kVAR

The difference between kVA and kVAR is pretty simple. "kVA" is the unit of apparent power whereas "kVAR" is the unit of reactive power. Before getting into the topic, we…

Continue ReadingThe difference between kVA and kVAR

Drawout circuit breaker positions and indications explained

Several operating indications can be seen on the front of an ACB or MCCB. Being an electrician or an engineer it is important that one must understand those indication and…

Continue ReadingDrawout circuit breaker positions and indications explained

What is PIV rating in a diode?

PIV stands for 'Peak Inverse Voltage'. It refers to the maximum reverse bias voltage a semiconductor diode or other semiconductor devices can withstand without damaging themselves. The peak inverse voltage…

Continue ReadingWhat is PIV rating in a diode?

Difference between resistance and impedance

When we speak about DC electricity, resistance is the term used to refer to opposition to current flow whereas impedance is the term used in AC electricity. Impedance is basically…

Continue ReadingDifference between resistance and impedance
  • 1
  • 2
  • 3
  • 4
  • …
  • 8
  • Go to the next page

Find a content

Like & Follow us

Follow @electricclassro

Related articles

  • Why is electricity transmitted at high voltages?
  • Drawout circuit breaker positions and indications explained
  • Earth Leakage Relay (ELR)
  • Why are potential transformers used in power system?
  • Buchholz relay – Working Principle, Construction and Operation
  • What are the different faults occurring in the overhead transmission lines?
  • Differences between resistance and resistivity
  • Electric Short Circuit
  • Electrical wiring color codes – Important
  • Difference between RCCB and RCBO
  • An overview of switchgear
  • What is meant by stalling of motor?
  • Transformer – FAQ | Interview Questions -Part 3
  • The difference between kVA and kVAR
  • Interview Question – Variable frequency drives
  • Surge Protection Device (SPD) | Surge protector
  • Star-Delta starter wiring diagram – Control and power wiring diagrams
  • Comparision of conventional energy resources
  • Difference between MCB and MCCB
  • Relay – Operation, types and applications
Copyright © 2022 Electrical Classroom. Contents may not be reproduced. Our Site uses cookie. By continuing to use our site you are agreeing to our Cookie policy DMCA.com Protection Status