Earth tester: Working and connection diagram, applications
An Earth Tester or Earth Ground Tester measures earth resistance to ensure safe grounding and proper flow of fault current for electrical safety.
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Illumination: Fundamental terms
Illumination is the study of light and its proper use in daily life and engineering. It helps us design lighting for homes, streets, factories, and offices. This chapter explains basic terms like luminous flux, lumen, candela, lux, and illumination in simple language. Understanding these concepts is important for exams like SSC JE, GATE, Polytechnic, B.Tech, … Read more
What is a resistor?
The resistor is a passive electrical component that creates resistance in the flow of electric
current. It is measured in Ohms(Ω) and denoted by ‘R’.
AC Parallel Circuit Formulas
In this topic, we have listed some of the AC Parallel circuit formulas, Current, Admittance, resonance etc.
Electrical Active and Passive Components
An active component in a circuit is a part that needs power to work. A passive component is a part that doesn’t need power to work.
Phase sequence and Polarity of Three Phase System
Phase sequence is the sequence in which the voltages in a three-phase system reach their peaks. Each phase-shifted by 120 degrees with respect to the other two.
Working Principle of DC Motor
The working principle of a DC motor is governed by Fleming’s left-hand rule. When a current carrying conductor is placed in a magnetic field,
Single Phase Transformer Formulas
Parameter Symbol / Formula Where Primary EMF Equation of Single Phase Transformer (Ep) f= frequency Np =Number of primary turns = maximum flux Secondary EMF Equation (Es) f= frequency Ns =Number of secondary turns = maximum flux Transformation ratio (K) Ns =Number of secondary turns Np =Number of primary turnsVp =Primary voltageVs =Secondary voltage Turn … Read more
Phasor and Complex Representation of Three Phase Supply
Three sinusoidal voltages with equal amplitude and frequency, but a phase difference of 120∘ (or 2π/3 radians) between them, constitute a three-phase supply. Common names for them include Phase R, Phase Y, and Phase B. For such a supply, the general form is as follows: Graphical Representation Phasor representation is a way of representing sinusoidal … Read more
DC Generator Formulas and Equations
Here, we have listed all the important DC Generator Formulas and Equations, DC generator EMF equation, power equation etc.