Identify the faulty torch
Key Learning Outcomes
1 Hour (Approximately)
Students will be able to explain the closed and open electrical circuit. The students are expected to create a game in which they have to identify torches with fault in connection i.e. having open circuit and find the ratio of (i) Faulty torches to Properly working torch and (ii) Faulty torch to total number of torch produced.
- Concepts to understand:
We are surrounded with electrical appliances all around us. These appliances run on electrical energy. The electrical energy which we get in the form of electricity is generated in power plants. With the use of electricity, our daily life is much simpler and easy. In our modern day, we use television, ceiling fans, lights and a lot many appliances which run on electricity. Without electricity we will be living in a dark age.
2.1 Electric Circuits:
The electricity that we get in our homes is used by appliances to do work, make our life easier etc. Every appliance has electric circuits inside it through which the electricity reaches the different components. Electricity flows in the form of electric current, which flows through wires made of specific materials. These materials are called as conductors. Conductors allows electric current to flow through them.
There are two main types of electric circuits:
- Open Circuit
- Closed Circuit
Before understanding what are open and close circuits, let us understand the different basic electrical components
- Components of electrical circuit
A simple electrical circuit have different components. Every component plays a unique role in ensuring proper functioning of any electric circuit. Let us understand them one by one.
An electric cell is a component used to run electrical appliances. An electrical cell produces small amount of electrical energy to run small appliances. The electric cell produces energy through the chemicals stored inside the electric cell
We all know what an electric bulb does, it gives light! Electric bulb is the most basic component of an electric circuit. When electricity is passed through the electric bulb, it gives out light and heat.
Light Emitting Diode:
A light emitting diode (LED) is an electric component which also gives out light energy. Light emitting diode is a semiconductor that gives out light similar to electric bulb. But LED’s consume less energy than a conventional electric bulb.
Wires are components through which electric current reaches appliances. In our homes we have electric wiring surrounding us, these wirings are insulated because electric current is very dangerous. Electric current can cause electric shock in living beings upon contact. Hence electric wires are often insulated with materials like rubber, plastic etc. Inside a wire, it is made up of conducting metals like copper.
Resistors are components that are used in electrical circuits to reduce to flow of electric current. The reduction of electric current helps in regulating the current required for appliances to function optimally. The electrical appliances internally have built in resistors to only give a required amount of current to ensure the functioning of the electrical appliance
A switch is a component which can cut off the supply of electric current through a simple on/off switch. A switch can either let the current pass through the circuit or completely cut it off. Switches play an important role through which we can either start or stop any appliance.
A fuse is an electrical component that protects electrical appliances from excess current. At times, due to power surge, there is always a chance that the surge can cause damage to the appliances. An electric fuse gets damaged in turn and protects the electrical appliances. Electrical fuses are of different ratings that are used for different appliances.
2.3 Open and closed circuit.
Generally electric circuits are either closed or open. A closed electric circuit means that switch is in open state and the electric current is flowing in the electric circuit.
2.3.1 Closed Circuit:
When the circuit forms a closed loop with the switch in ON position, then the circuit is complete. A completely closed loop circuit is called as a closed circuit. In a closed circuit, connected with a battery and an appliance, electric current will flow through the circuit. A switch in an ON state in an electric circuit forms a closed circuit thus allowing electric current through flow in the circuit because of the battery. In this case the electric bulb will glow since the electric current is passing through the circuit and makes the bulb glow.
2.3.2 Open Circuit:
An open electric circuit implies that the electric circuit is not functioning and electric current is not passing through it. If electric current doesn’t pass through the circuit, then the appliance will not function. In this case it is an electric bulb that will not glow because the switch is in an OFF state.
2.3.3 Factors that can cause an open Circuit:
An electric circuit could not be operational for the following reasons:
- When the components are not properly connected to each other
- If wire is broken in the electrical circuit
- If the bulb is fused (not working)
- If the fuse connected in the circuit breaks
Due to these reasons the path for the current breaks and the circuit becomes open. The figure below shows various configurations in which circuit may or may not be operational.
2.4 Tester to identify open and closed circuit.
A simple tester can be made using, a cell, three pieces of electric wire, a bulb connected as shown in the figure 4. Your tester is ready.
To test whether the circuit is open or closed, we just need to connect this tester around the components of the electrical circuit. When the switch is in the off position the circuit is open and the tester wont work.
Using the tester, each component of the circuit can be tested individually.
Use the tester in the following situations:
- To test whether the fuse in a circuit is broken or not, place wire A of the tester to one end of the fuse, and wire B of the tester to the other end of fuse. If bulb of tester glows then the fuse is working proper. If bulb does not glow, then fuse is broken. And we need to replace the fuse.
- To test whether the bulb is fused or not, place wire A of the tester to one terminal of the bulb, and the other wire B to the negative terminal of the bulb. If both the bulbs glow, then the bulb forms the circuit is working properly. If both the bulbs do not glow then the bulb from the circuit is fused and we need to change it.
To identify other components of the circuit, we need to place the terminals of those equipment between the open ends of wire A and B of the testers.
To check the components of a closed working circuit, the electric cell from the is removed. Only bulb with two connecting wires is used as a tester. The wires of this tester are connected across the components of the working electric circuit. If current pass through the tester, bulb will glow indicating that the circuit is working properly. For any faulty component of circuit the bulb would not glow.
You are given electric circuits which are open circuits. You have to identify the flaws in the circuits and troubleshoot to make them closed circuits so that the appliance can function.
Game Design Overview
The game comprises of 1 level, where the open electrics will be displayed one after the other, you will have to use the tester and identify the continuity. Once you have identified the break, you will have to add a piece of conductor and complete the circuit. Upon completing the circuit, you will have to test the circuit whether the circuit is an open or closed circuit. There will be a timer against which you will be racing and finishing the task.
How to Design the Game:
In your dashboard, you are able to see 1 open circuit at a time and there is a 30 second timer wherein you have to identify the broken section and fix it with a piece of conductor.
You could either drag and drop the piece of wire or click on it to make it appear on the disjointed section
Before fixing the piece of conductor, you will be given a tester with which you can identify the discontinuity in the circuit.
After identifying the discontinuity, you will have to place a piece of conductor to complete the circuit and make the circuit a closed circuit. Upon doing this, put the switch in “ON” state and then test whether current is flowing through the circuit using the tester.
You can build the game choosing 5 different open circuits. For fixing every circuit, you will get 30 seconds for each circuit, if at any point you are not able to finish the circuit, game will be over.
Learning Objective Based Evaluation (0-2)
Higher Order Thinking Skills
Learning Objective Based Evaluation Total Score
Higher Order Thinking Skills Total Score
Learning Objective Based Evaluation
1 point Questions:
Q1. Which of the following components play a role of regulating the electric current in an electric circuit?
- Electric cell
- Light Emitting Diode
Q2. A light emitting diode is a semi-conductor that is more energy efficient in comparison with an electric bulb.
Q3. An open circuit will not allow current through pass through the electric circuit.
2 point Question:
Q4. How can you ensure continuity in a closed circuit if there is any malfunction in the circuit?
- Ensure that the electric circuit has continuity
- Ensure that the fuse is not blown
- Ensure that the battery is connected properly
- All of the above
Evaluation of HOTS (Higher Order Thinking Skills)
Identification of the Problem Statement:
Q5. What is the objective of the game that you have designed? (1 point)
Q6. Does the game designed solve the problem? Justify your answer. (1 point)
Solution of the Problem Statement:
Q7. How does the game designed address the problem? (1 point)
Q8. Can the solution be implemented in real life? Justify your answer (1 point)
Innovation in the Problem Statement:
Q9. What are the innovative aspects of the solution for which the game is designed? (2 points)
Creativity in the Game Design:
Q10. Describe and explain the unique design elements used in the game. (2 points)
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