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Multimeter and Voltmeter are handheld measuring devices. Voltmeters are used when one needs to measure only voltage. Multimeters, in contrast, can be used to measure multiple electrical quantities such as current, voltage, resistance, etc.Go through this article to find out the features of multimeters and voltmeters and how they differ from each other.What is a Multimeter?Multimeter, as the name implies, is a combination of different measuring instruments in a single unit. It can measure several electrical quantities such as current, voltage, resistance, etc. An extended version of multimeter can also measure other electrical properties like transistors gain, diode forward voltage, ... Read More
Electrical engineering deals with the study of how to generate, transmit and utilize the electrical energy. Electronics engineering, on the other hand, deals with the study of how to control and switch the flow of electrical energy in a circuit. Go through this article to find out the other major differences between electrical and electronics engineering.What is Electrical Engineering?Electrical engineering is the branch of engineering which deals with the generation, transmission, distribution and utilization of electrical energy.Electrical engineering is also concerned with study and design of electrical machines. The field of electrical engineering provides solutions for problems in various fields ... Read More
Bipolar Junction Transistor (BJT) and Insulated Gate Bipolar Transistor (IGBT) are two types of transistors that are used in electronic circuits to control the currents. Read through this article to get an overview of how BJTs and IGBTs function and the major differences between them.What is BJT?BJT stands for Bipolar Junction Transistor. The BJT is a three layer, three terminal semiconductor device which is used in the electronic circuit for switching and amplification of signalsA BJT is formed by sandwiching either a P-type or N-type material between two layers of N-type material or P-type material respectively. Thus, based on the ... Read More
Power transformers and Distribution transformers are extensively used in power systems for stepping up and down the voltage level for various applications such as transmission and distribution. Read through this article to find out the major differences between power transformers and distribution transformers and how they function.What is a Transformer?A Transformer is a static electrical machine which changes the level of voltage and current in a circuit without changing the frequency of the supply. Transformers works on the principle of electromagnetic induction.Based on the design, operation, purpose of use, transformers are classified into different types such as auto-transformer, current transformer, ... Read More
Both conductors and insulators are extensively used in various fields of electrical and electronics engineering. In this article, we will compare and contrast the various features of conductors and insulators and how they function.What is a Conductor?The material which allows the electric current to pass through it is known as conductor. In other words, the material which has less than 4 electrons in its outermost shell is known as conductor.When electric potential is applied across a conductor, the electrons can freely move from atom to atom. In a conductor, the valance band and the conduction band are overlapped each other. ... Read More
LED lamps consume less energy as compared to Halogen lamps. LED lamps are cost efficient too. Read through this article to find out the major differnces between LEDs and Halogen lamps and how they function.What is LED Lamp?An electric lamp which produces light by using light emitting diodes or LEDs is known as an LED lamp or LED light bulb. An LED lamp works on the principle of electroluminescence, i.e. it emits the light due to the interaction of an electric field with a suitable solid.Basically, an LED is a specially doped PN junction diode which is made of special ... Read More
Both analog and digital circuits are extensively used in various fields of electrical and electronics engineering for signal processing. Go through this article to find out how analog and digital circuits function and how they differ from each other.What is an Analog Circuit?An analog circuit is a type electronic circuit that can process any analog signal or data and produce an output in analog form. Analog circuits are composed of resistors, inductors and capacitors, etc.The type of signal which is a continuous function of time is known as an analog signal. All the real-world signals are the analog signals, therefore, ... Read More
Series and Parallel electric circuits are heavily used in various applications such as resistive series circuits, voltage divider circuits, home appliances, etc. It is important to have a good knowledge of how these circuits work. Go through this article to get an overview of how Series and Parallel circuits operate and how they differ from each other.What is an Electric Circuit?An electrical network which has closed path for electric current to flow is known as electric circuit or circuit. An electric circuit consists various circuit elements such as energy sources, resistors, inductors, capacitors, etc. An electric circuit must have at ... Read More
Both thyristors and transistors are semiconductor devices widely used in various applications. Read through this article to find out how a thyristor differs from a transistor.What is a Thyristor?A thyristor is a four-layer three-terminal semiconductor device. A thyristor consists of three PN-junctions. The three terminals of the thyristor are: anode (A), cathode (C) and gate (G). The gate is the terminal of the thyristor which is used to provide control signal to the device. The circuit symbol of the thyristor is shown in Figure-1.A thyristor possesses high ratings of voltage and current and also has the ability to handle large ... Read More
To crack the prestigious national level exam of India, IAS (Indian Administrative Service) conducted by UPSC is a dream for many aspirants all over India. This exam is generally considered as a hard nut to break from the students perspective in terms of the exam duration and various levels of testing, depth of the syllabus and the amount of stress required to face. However, despite putting some herculean efforts, many students fail to make it to the top either in the prelims, mains or interview levels of the clearing process.Following are certain key guidelines which can help the aspirants to ... Read More