KNOWLEDGE ABOUT COMMON TOOLS

KNOWLEDGE ABOUT COMMON TOOLS

1 Krishna Kumar Mishra (TGT-Work Experience) Kendriya Vidyalaya Sangtathan Lesson Plan Class:- VII A & B Month:- April 2020 Date of Commencement: - 01-04-2020 Expected date of Completion: - 30.04.2020 Subject: - Work Experience Topic: - Electrical Symbols T.L.O.:- In this topic student of Class -7 learn about – ✓ Recognizes the Electrical Symbols, ✓ Read Circuit with the help of Electrical Symbols Safe, ✓ Use of Electrical Symbols , ✓ Identify electrical Components with the help of Electrical Symbols, GIST: - In this lesion we discuss about Electrical Symbols under following topic – Mind Jog -Use previous knowledge and complete a small task. Activity: - Identify the following Symbol use in daily Life. Try to make all symbol in your notebook and explain their meaning in one line. What is Electrical Symbol:- Symbols are a shorthand way of showing the locations, types, and sizes or ratings of electrical wiring and equipment, and the interrelationships between these items. An electrical/Electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit. These symbols are largely standardized internationally 2 Krishna Kumar Mishra (TGT-Work Experience) Kendriya Vidyalaya Sangtathan today, but may vary from country to country, or engineering discipline, based on traditional conventions. Why we uses of electrical symbols:- • It eases the representation of an electrical component. • It makes the circuit drawing easier and compact. • It gives important insights into the circuits and increases the speed of solving electrical circuits. Basic Electrical Symbols :- Let's go over some sample electrical symbols and what they represent. DIAGRAM Ground or Earth A ground symbol identifies a ground terminal. It can be used for a zero potential reference point from where current is measured. It is also for electrical shock protection. There are a few different ground symbols. The one we're showing here is "Earth", but there's also a Chassis and Digital/Common ground with slight variations to this symbol. Resistor A resistor reduces current flow. In a schematic, this is represented with a few zig zag squiggles. There are also symbols for variable and adjustable resistors as well as thermal and preset resistors. Switch Disconnects the current when open. We're showing a simple SPST (singlepole single-throw) toggle switch, but there are variations for SPDT, pushbutton, dip, relay, and more. Capacitor A capacitor symbol shows two terminals running into plates. The curved plate indicates that the capacitor is polarized. The curved side has lower voltage. A small plus sign can be added to the straight side indicated the positive pin. Fuse A fuse protects electrical circuits by stopping the flow of current when the intensity of current exceed a set value. It does this by melting a special wire. Antenna Marks a device, rod, or wire designed to capture radio and electromagnetic waves into electrical signals and vice versa. Inductor An inductor is also called a coil or reactor. The coils store energy in a magnetic field or flux. An inductor symbol looks like a series of looped coils. 3 Krishna Kumar Mishra (TGT-Work Experience) Kendriya Vidyalaya Sangtathan Transformer A transformer is two or more coils coupled by magnetic induction. It helps keep the frequency and reduce tension in an AC circuit. Motor A motor is a device that can transform electric energy into mechanical energy. Source Represents the power source for your electronics. This symbol represent a direct current (DC). To represent AC current, you'd replace the plus and minus sign with a wave. Battery Batteries are represented on a schematic with a pair of disproportionate, parallel lines. The number of lines indicates the number of series cells in the battery. Diode A diode only allows current to flow in one direction. It's always polarized with an anode (A, positive) and cathode side (C, negative). IMPORTANT QUESTION:- 1. Identify the symbol in following figure and what is the use of following symbol . PROJECT /ASSIGNMENT:- Submit a small project on discovery in your surrounding – ➢ Name of symbol ➢ Place of symbol where you see ➢ Diagram /Picture of symbol ➢ Any other information etc