Chemical to Electrical Energy Practice exercise 1

Describe the process by which a dry cell produces electrical energy to light a bulb when used in a torch. Include what happens inside the cell. (2 marks)

Explain how chemical energy stored in a battery is transformed to make the flash work in a disposable camera when a picture is taken. (2 marks)

Mention two common devices found in Kenyan homes that rely on batteries or cells. Briefly explain how they use chemical energy to operate. (2 marks)

Mention two common devices found in Kenyan homes that rely on batteries or cells. Briefly explain how they use chemical energy to operate. (2 marks)

Study the diagram below of a circuit connected with dry cells, wires, and a bulb. Explain what type of energy transformation occurs in this setup and describe what you would observe if the switch was turned on. (2 marks)

Study the diagram below of a circuit connected with dry cells, wires, and a bulb. Explain what type of energy transformation occurs in this setup and describe what you would observe if the switch was turned on. (2 marks)

What is meant by the transformation of chemical energy into electrical energy? (1 mark)

A Grade 8 learner inserts two dry cells into a toy car, and it begins to move. Using your knowledge of energy, explain how the dry cells help the car operate. (2 marks)

Amina uses a flashlight during a camping trip. She tells her friends it works using chemical energy. Describe how this energy is transformed to produce light. (2 marks)

In a school science fair, a learner uses lemon juice, copper and zinc wires to light a small bulb. Explain what energy transformation occurs in this setup. (2 marks)

James notices that his torch works again after he replaces the dry cells. Explain how the new cells help the torch function by referring to energy transformation. (2 marks)

Study the diagram below showing the internal setup of a torch with two dry cells, a switch (labelled B), connecting wires, and a bulb.a) Identify the type of energy stored in the dry cells. (1 mark)b) What energy transformation takes place in this circuit? (1 mark)

Study the diagram below showing the internal setup of a torch with two dry cells, a switch (labelled B), connecting wires, and a bulb.a) Identify the type of energy stored in the dry cells. (1 mark)b) What energy transformation takes place in this circuit? (1 mark)