Electrical Laws

Ohm's Law Coulomb's Law Kirchoff's Law Faraday's Law Ampere's Law Joule's Law Lenz's Law Biot Savart Law

Electrical Theorems

Thevenin Theorem Nortons Theorem Super Position Theorem Reciprocity Theorem Compensation Theorem Maximum Power Transfer Millmans Theorem Tellegans Theorem

Electrical Rules

Flemings Left Hand Rule Flemings Right Hand Rule Cork Screw Rule

Electrical Network

Network Terminologies

Electrical Terms

Electrical Terms Materials Capacitors Resistors Inductor Self Inductance Mutual Inductance Magnetic Flux Magnetic Characteristics EMF MMF Permeability Sources Reluctance Torque

Electrical Transformer

Transformers How Transformer Works Transformer Classifications Types Transformers Core Type Transformers Ideal Transformers Parallel Operation Transformer Cooling Transformer Forces Transformer Losses Transformer Testing Transformer Bushing Transformer Windings

Types of Transformer

Auto Transformer Current Transformer Potential Transformer Rectifier Transformer Converter Transformer

AC Motor

Stator and Rotor Three Phase Induction Motor Induction Motor Transformer

AC Generator

AC Generators Alternator Stator Construction Alternator Rotor Construction Alternator - Parallel Operation Synchronizing AC Alternator Losses in Alternator

DC Motors

DC Motors Commutator Braking of Electric Motors Dynamic Rheostatic Braking Regenerative Braking Plugging Braking Speed Control DC Motor Losses DC Motors

Types Of DC Motor

DC Motors Types DC Series Motors DC Shunt Motors DC Compound Motor Brushless DC Motors Permanent Magnet DC Motor

Starter For DC Motors

Starters DC Motors

DC Generator

DC Generator Types DC Generators Sparking DC Generators Why Generator Overloading Losses DC Generators

Parallel Operation

PO - DC Generator Series DC Generator Shunt DC Generator Compound DC Generator
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Kirchoff's Law

Kirchoff's voltage law states that the algebraic sum of all branch voltages around any closed path in a circuit is always zero.

What will be the Voltage?

By using Kirchoff's Voltage law, the sum of the potential drops is equal to the sum of the potential rises.

30 V = 2V + 5V + 3V + ?V + 10V + 6V

?V = 4V.

Kirchhoff's Current Law

Kirchhoff's current law states that the sum of the current entering into any node is equal to sum of the currents leaving that node.

What will be the Current I 1, I 2, I 3?

By applying kirchhoff's current law,

I (entering current) = I 1 + I 2 + I 3 (leaving current)

I = V / 1 + V / 2 + V / 3

10A = V [ 1 / 1 + 1 / 2 + 1 / 3 ]

10A = V [ 1 + 0.5 + 0.333 ]

V = 10 A / 1.83

V = 5.46 V

Clearly, by using ohm's law I = V / R

I 1 = 5.46 / 1 = 5.46A

I 2 = 5.46 / 2 = 2.73A

I 3 = 5.46 / 3 = 1.82A

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