1. Bell Work 1.What is the equation for resistance? 2.What happens to the current if the voltage is doubled? 3.What happens to the current if the voltage is doubled and the resistance is doubled? 4.What happens to the current if the voltage is doubled and the resistance is halved?

2. How is a teacher like a fuse?

3. P4.5 Electrical Safety Lesson Objectives To explain how electrical devices are designed with protection in mind Learning Outcomes Grade C Describe and explain the functions of a plug Grade B Explain why double insulated appliances are useful Grade A Describe and explain how fuses work Grade A* Explain why houses use a combination of fuses and circuit breakers What do you already know about today’s learning outcomes?

5. All appliances need Earthing? Agree/disagree/why?

6. Fuses Why is this device useful? What are the disadvantages?

7. What? Why? When?

8. P4.5 Electrical Safety Lesson Objectives To explain how electrical devices are designed with protection in mind Learning Outcomes Grade C Describe and explain the functions of a plug Grade B Explain why double insulated appliances are useful Grade A Describe and explain how fuses work Grade A* Explain why houses use a combination of fuses and circuit breakers What do you already know about today’s learning outcomes?