Many misconceptions develop in learners' minds about electricity and electrical phenomena if teachers are not careful about the correct use of scientific language and appropriate conceptual development of these ideas. Teachers speak, for example, too loosely about concepts like electricity, electric current and charge as if these concepts are the same thing. Learners were first introduced to electricity in Gr. If we think of the world that we are currently living in, one of the things that we encounter every day and almost everywhere is electricity.
Name and draw five appliances in your home that need electricity to work. You are building a brand new house. You want an electric stove in your kitchen.
Name all the things that must be done for your stove to work. Electric stove is connected to the electrical supply from a supplier like ESKOM, also called the mains supply.
An electrician must install the connecting wires in the house. A cellphone works from a rechargeable battery. The stove is connected to the mains supply. The cellphone battery is recharged from the same electrical supply as for the stove. Electricity is the name given to a wide range of electrical phenomena. It underlies in one form or another almost everything around us.
It has applications in science, engineering and technology. It has to do with the physical phenomena associated with the presence and movement of electrically charged objects. Electricity includes a wide variety of well-known electrical effects, such as lightningstatic electricityelectromagnetic induction and an electric current in an electric wire. We are using electricity all the time. We need to understand what it is about and how to use it safely and correctly.
Have you ever used a flash light torch? What is it used for? How do you get the flash light to work? Let us try to get the bulb of a torch to work. We want to do this without using the torch itself. In step 2 of the Learning Cycle, learners explore how to construct a simple electric circuit by getting a light bulb to work.
Before getting the learners to do the activity, do it yourself and ensure that it works with the batteries and bulbs available. Some bulbs might need a battery of more than 1.Question 1 What is meant by an electric circuit? Question 2 Draw a circuit consisting of a cell, a torch bulb and connecting wires? Question 3 What is meant by a complete circuit?
Question 4 What is meant by an open circuit? Question 5 Draw a labelled diagram of a torch? Question 6 Where does a torch gets electricity from? Question 7 Why do we need a switch in the torch?
Question 8 How does a fused bulb differ from a normal bulb? Question 9 What happens to the circuit when the bulb in it gets fused? Question 10 What is the purpose of using an electric switch? Question 11 Name some electrical gadgets which have switches built into them? Question 12 What is the function of a switch? Question 13 What is an open switch? Question 14 What is a closed switch? Question 15 What is torch?
An electric circuit is a path along which electricity can flow. The electric circuit provides a complete path for electricity to pass or current to flow. The bulb glows only when electricity or electric current passes through the circuit. In a closed circuit, the electric current passes from one terminal of the cell to the. A bulb will not light up if the circuit is open or broken.We deliver up-to-date correct, authentic data based on evaluation unbiased at no cost to you.
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Circuit Diagram Softwares. Counter Circuit Diagrams. Filter Circuit Diagrams. Fire Alarm. High Voltage CircuitDiagrams. Home Automation CircuitDiagrams. Lights and Display Board Circuits. Metering and Instrument Circuits. Motor Circuit Diagrams.
Power Supplies. Radio — Wireless. Schematic Symbols. Signal Generators.
Simple Circuits. Solar Circuit Diagrams. Speed Controller CircuitDiagrams. Telephone Related. Television — TV Related. Three phase circuitDiagrams.LED and Resistors are the first few components which are introduced in the starting of Electronics subject in schools. For building this circuit you only need four things:.
You just need to connect positive terminal of LED with the one end of resistor and then connect another end of resistor with the positive terminal of Battery. Then connect the negative terminal of LED with the negative terminal of Battery. This Negative Terminal of Battery is also referred as the Ground. The whole setup is built on the breadboard as shown above. So the bigger leg is the positive side of the LED and the smaller leg is negative side.
Below is the picture for the same:. We can also make the same circuit using two AA size 1. Resistor is very important component here, if you connect LED to the Battery without any resistor, then your LED will burn immediately.
Some LEDs have more or less current consumption according to their colors and ratings, but here we are explaining this in general. So here we can calculate the resistor value by using the basic OHM law which states:. So according to the formulae:.
So the remaining voltage 9 - 2. You can also calculate the resistance value by using this LED resistor calculator. These current and voltage values are not exact and can be vary according to the Battery capacity and LED. But generally you can use or ohm resistor with any LED, or you can also use 1k resistor if the proper values are not available. Get Our Weekly Newsletter! Helena St. Related Content. Mechanically powered Emergency Flashlight.
Comments Log in or register to post Comment.All the chapter wise questions with solutions to help you to revise the complete CBSE syllabus and score more marks in Your board examinations.
Question 1: Choose from the options abc and d given below the figure which shows the correct direction of current. Solution: b Current always starts from positive terminal and end at negative terminal of the battery.
This is conventional direction of flow of current in a circuit. Question 2: Choose the incorrect statement. Electric cell is a source of electricity in the circuit. Other options are the functions of a switch. Question 3: In an electric bulb, light is produced due to the glowing of a the glass case of the bulb b the thin filament c the thick wires supporting the filament d gases inside glass case of the bulb Solution: b In an electric bulb, its thin filament glows and gives off light and heat.
However, a steel spoon, a metal clip and a copper wire are conductors of electricity. Question 6: Filament of a torch bulb is a a metal case b metal tip at the centre of the base c two thick wires d a thin wire Solution: d Filament of a torch bulb is a thin wire which gives off light.
It is fixed to two thicker wires which provides support to it. One of these thick wires is connected to the metal case at the base of the bulb and the other thick wire is connected to the metal tip at the centre of the base. Question 7: Paheli is running short of connecting wires. To complete an electric circuit, she may use a a glass bangle b thick thread c rubber pipe d steel spoon Solution: d Since, a steel spoon is a conductor of electricity therefore, current will pass through it.
So, Paheli can use a steel spoon to complete the circuit. Question 8: In which of the following circuits A, B and C given in figure, the cell will be used up very rapidly? Solution: The cell will be used up rapidly in A because all the current will discharge through the wire very rapidly as no appliance is connected between the positive and negative terminals of the cell. Question 9: Figure shows a bulb with its different parts marked as 1, 2, 3, 4 and 5.
Which of them label the terminals of the bulb? Question You are provided with a bulb, a cell, a switch and some connecting wires. Draw a diagram to show the connections between them to make the bulb glow. Solution: The complete circuit diagram so that the bulb glows is given below:. Question Will the bulb glow in the circuit shown in figure? Solution: As in the given circuit diagram, it seems that the switch is open, i.
Question An electric bulb is connected to a cell through a switch as shown in figure. When the switch is brought in ON position, the bulb does not glow.Split Decision is defined as the same fighter scoring more points than the other on two of the judges' scorecards, but the third judge scoring the other fighter as the winner.
Unanimous Decision - Decision is on scorecard points between the judges. Unanimous Decision is defined as the same fighter scoring more points than the other on all three of the judges' scorecards. For settlement purposes where a half round is stated then 1 minute 30 seconds of the respective round will define the half to determine under or over.
If the number of rounds for a fight is changed after this market has been set then all bets will still have action unless the new number of rounds result in the quote being higher than the total number of rounds to be fought. For UFC specifically, where a half round is stated then 2 minute 30 seconds of the respective round will define the half to determine under or over. If for any reason the number of rounds in a fight is changed then bets on round betting already placed will be void and stakes returned.
For betting purposes betting on rounds or groups of rounds is for a fighter to win by KO, TKO or disqualification during that round or group of rounds. In the event of a Technical Decision before the end of the fight all bets will be settled as a win by Decision. Draw-No-Bet - In the event of a draw all bets will be void and stakes returned, this includes a fight which ends in a Majority Draw.
Total Rounds 2-Way - Full round quotes are used. The Round in which the fight ends will be used for settlement purposes. In the event of a fighter retiring on his stool between Rounds e.CIRCUIT DIAGRAM
In the event of a Technical Decision before the end of the fight, all bets will be settled as a win by Decision. For fights where a draw is not possible e. Prizefighter, the Draw or Technical Draw is not quoted. To Go the Distance - For settlement purposes the official designated number of rounds must be fully completed for bets to be settled as Yes. For settlement purposes a knockdown is defined as a fighter being KO'd or receiving a mandatory 8 count (anything deemed a slip by the referee will not count).
The following minimum number of overs must be scheduled, and there must be an official result (Duckworth-Lewis counts) otherwise all bets are void, unless settlement of bets is already determined. Test and County Championship Matches - The whole match counts.
In drawn matches there must be a minimum of 200 overs bowled. Prices will be offered for the total runs scored during the 1st over of the match. Extras and penalty runs will be included. The over must be completed for bets to stand unless settlement is already determined. The following minimum number of overs must be scheduled, and there must be an official result (Duckworth - Lewis counts) otherwise all bets are void, unless settlement is already determined.
Test and First Class Matches - The whole match counts. Prices will be offered on which team creates the most run-outs whilst fielding. If a match is abandoned due to outside interference then all bets will be void unless settlement is already determined. If a match is reduced in overs and a match result is reached then the team who effected most run-outs whilst fielding regardless of the amount of overs bowled will be the winners.
In matches determined by a Super-Over any run out during the Super-Over will not count for settlement purposes. In Test and First Class Matches all innings of the match will count. Prices will be offered for the number of runs scored during the 1st innings of the match, regardless of which team bats first. The following minimum number of overs must be scheduled otherwise all bets are void, unless settlement is already determined.
Test and First Class Matches - Declarations will be considered the end of an innings for settlement purposes. In the event of the 1st innings being forfeited all bets will be void. In the event of an innings not being completed due to outside interference or inclement weather all bets will be void unless settlement is already determined.
If a match is abandoned due to outside interference then all bets will be void, unless settlement is already determined.We found everything so easy to navigate with all the documents and vouchers. All the included food was plentiful and delicious.
I have raved about this tour to all my friends and family since I have gotten back. I have especially raved about how incredible our agent, Sofia, was. She was so efficient and catered to our every need. We had an absolute blast and anyone who travels to Scandinavia should definitely book and travel with Nordic Visitor!. Jeffrey and Kristin, United States Northern Lights City Break, January 2016 We tell everyone we know to go to Iceland and to use your company if they go.
Even met people in Iceland who were with another company, and after listening to us, they took down your information. We have enjoyed every tour we've taken with your company.
Rachel, United Kingdom Northern Lights City Break, December 2015 Anita was fabulous, I booked my trip almost a year in advance and had endless questions and Anita always got back to me quickly and in a very polite manner.
She is superb and is a huge credit to your organisation. The trip was everything I wished it to be and more, thank you. Kayla, United States Golden Triangle - Starting in Copenhagen, December 2015 Nordic Visitor made everything SO EASY. Catherine and Scott, United States Volcanic Iceland, November 2015 The Hotel was in the perfect location for us.
The Tour Guide was very knowledgeable about the areas (history, geology).
NCERT Exemplar Class 6 Science Chapter 12 Electricity and Circuits
I think he made this the most memorable trip we have ever had. My husband and I would not have had as much fun on a big bus tour with lots of people so we were not sure what this tour would be like.
It was a small group (just us. We loved the city, and loved the trip - again, this was the perfect trip for us. I am very glad I found Nordic Visitor. I am not a very experienced traveler, but wanted to get out and see another part of the world. My husband and I have already talked about going back to Iceland and we expect to book with Nordic Visitor again. Thanks for such a great experience. Lindsey, United States Northern Lights Circle Tour, November 2015 The tour was amazing.
Our guide was extremely knowledgeable about the geology and history of Iceland. She pointed out many things we would have missed on our own. There was trouble with the sound system on the bus the first day, but she arranged a replacement. We have been talking about going to Iceland for a chance to see the northern lights for over ten years. This trip exceeded all of my expectations. We were lucky enough to see the northern lights at the beginning of the trip, which fulfilled the dream.
When people ask how the trip was, I struggle to answer them.