How to Test a PN Junction Diode Using a Multimeter?
A PN junction diode can be tested using a multimeter in two ways using the diode test mode or the
Basic Electronics
September 2026
Battery
How Does Hydrometer Work in Lead Acid Battery Testing?
A hydrometer is an instrument used to measure the specific gravity or relative density of a liquid. It is made
Household Appliances
Can Circuit Breakers Go Bad Without Tripping?
Yes, circuit breakers can go bad without tripping. A circuit breaker can degrade internally through corrosion, bimetallic strip wear, or
Household Appliances
Whole House Surge Protector: Working, Types & Installation
A whole house surge protector also called as Type 1 or Type 2 SPD (Surge Protective Device) is a hardwired
Basic Electronics
Bipolar Junction Transistor (BJT): Working, Types, and Applications
A Bipolar Junction Transistor (BJT) is a three-terminal semiconductor device. It is constructed by sandwiching three alternating layers of P-type
Power System
How Auto Re-closing of Circuit Breaker Works in Power System?
Auto re-closing is a protection scheme used in electrical power systems for transmission and distribution lines. When a circuit breaker
Power System
Difference Between Isolator and Circuit Breaker
Isolators and circuit breakers are two separate switching devices used in electrical power system and each of them has a
Basic Electronics
Half Wave Rectifier: Working Principle, Circuit Diagram, Formulas
A half wave rectifier is a circuit that converts alternating current (AC) into direct current (DC). It allows only one
Power System
What is Busbar? Working, Function, Types & Applications
A busbar is a low-impedance metallic conductor made of copper or aluminum. Busbar collects electrical power from one or more
Basics
Difference Between Single Phase and Three Phase Power System
The main difference between a single phase system and a three phase system is that a single phase system uses
Basic Electronics
PNP Transistors: Structure, Working Principle, Biasing
A PNP transistor is one of the two main types of bipolar junction transistors used in electronic circuits. It is
Basic Electronics
Zener Diode: Construction, Working, Characteristics, and Applications
A Zener diode is a two-terminal semiconductor device made from heavily doped P-type and N-type silicon semiconductors. Zener diode operates
Basic Electronics
PN Junction Diode: Working, Types, Characteristics and Applications
A PN junction diode is a two-terminal semiconductor device. It is formed by joining a P-type semiconductor material with an
Battery
What is Float and Boost Charging in Battery Systems?
Float charging and boost charging are two operating modes used in battery charging systems. Both modes run at different voltage
Basic Electronics
NPN Transistors: Working Principle, Types and Applications
An NPN transistor is a type of bipolar junction transistor (BJT). It has three layers of semiconductor material: two N-type
Battery
Lead-Acid Battery: How It Works, Types, Construction, and Applications
A lead-acid battery is an electrochemical device that stores electrical energy in chemical form and releases it as direct current
Induction Motors
Split Phase Induction Motor: Working, Construction & Applications
A split phase induction motor is a type of single-phase AC induction motor. It uses two windings: a main winding
Basics
What Does 1 Unit of Electricity Mean?
1 unit of electricity equals 1 kilowatt-hour (kWh). This is the standard measurement used by electricity boards and utility companies
Basic Electrical Engineering Concepts
Difference Between Time Period and Frequency
Time period and frequency are two terms that come up again and again in electrical engineering, physics, and signal processing.