1. How do an open circuit and a closed circuit differ? * 2 points Open circuit means no current can flow. There is no continuous path round the circuit. Closed circuit is the opposite: there is a continuous path, via whatever wires and components, and current can flow. Open circuit means current can flow. There is continuous path round the circuit. Closed circuit is the opposite: there is a no continuous path, and current can flow. None of the above 1. How do you know if a circuit is complete? * 2 points A complete circuit is almost like a circle. Energy flows through this circle in order to make the light bulb light. A complete circuit is an unbroken circuit could be called a complete circuit or a closed circuit. A complete is unbroken path through which electric charges will flow How does electricity flows to your appliances? * 2 points Electric appliances works by using electrical energy to perform a task There are different types of electrical appliances that are energy converters such as converting electricity to light, rotating force or heating. All of the above Let’s Try (Evaluation) A. Read the questions carefully and select the letter of the correct answer. 1. Which of these is a source of electrical energy? * 1 point a. battery b. light bulb c. switch d. insulator 2. What is the electric current when the switch is “ON”? * 1 point a. open b. closed c. broken d. conductor 3. Which of these materials controls the flow of electric current? * 1 point a. battery b. switch c. light bulb d. open 4. What makes a circuit open? * 1 point a. when the switch is on. b. when the switch is off. c. when the switch is destroyed. d. when the switch is new. 5. Electric current flows easily through some materials made of metals. What do you call these materials? * 1 point a. insulators b. transmitters c. conductors d. non-conductors B. Match the concept in column B with its description in column A. Write your answer on the space before each number. * 5 points a. battery b. circuit c. closed d. light bulb e. open f. wires 1.
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