G5 Unit 3 Revision

What is electricity?

• Electricity is the flow of protons

• Electricity is the flow of electrons

• Electricity is the flow of neutrons

• Electricity is the flow of atoms

Current is the rate of flow of electrons. Which one has the largest current?

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You use one AAA battery in your alarm clock. Calculate the power for this battery.

• Power = Voltage x Current= 1.5 x 8 = 12W

• Power = Voltage x Current= 1.5 x 1.2 = 1.8W

• Power = Voltage x Current= 1.5 x 2.4 = 3.6W

• Power = Voltage x Current= 1.5 x 1 = 1.5W

Ahmed wants to use this lamp for 2 hours. Calculate the electrical energy, if Power = 3.6W.

• Electrical energy = Power x Time = 3.6 x 2= 7.2 kWh

• Electrical energy = Power x Time = 3.6 x 1= 3.6 kWh

• Electrical energy = Power x Time = 3.6 x 4= 14.4kWh

• Electrical energy = Power x Time = 3.6 x 3= 10.8kWh

Look at this circuit. Which one is the schematic drawing for this circuit?

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What do we call the moving parts of a robot which are connected to the robot’s motors?

• Mechanical system

• Electrical system

• Control unit

• Design thinking

Which stage of the design process do you collect information, notes and images related to your project?

• Analyse the problem

• Research and planning

• Design problem or brief

• Produce the final product

Which of these is an electrical component?

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Which stage of the design process involves building a design or creating a program?

• Research and planning

• Analyse the problem

• Test and evaluate the product

• Produce the final product