QR Challenge: Circuits and electricity

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

• Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
• Bring these devices into the lesson.

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

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B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

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C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

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Questions / Answers (teacher reference)

Question	Answer
1. What is voltage measured in?	Volts
2. What is current measured in?	Amps
3. What is the equation to calculate resistance?	V=IR
4. What is resistance measured in?	Ohms
5. What component in a circuit can be used to measure voltage?	Voltmeter
6. What component in a circuit can be used to measure current?	Ammeter
7. Find and draw the circuit symbols for the following components: Lamp, cell, battery, ammeter, voltmeter and diode.	N/A
8. Find and draw the circuit symbols for the following components: Switch (open), switch (closed), fuse and resistor.	N/A
9. Find and draw the circuit symbols for the following components: Variable resistor, thermistor, light dependent resistor and light emitting diode.	N/A
10. Draw an example of a series circuit.	N/A
11. Draw an example of a parallel circuit.	N/A
12. What is the definition for current?	Rate of flow of charge
13. When two objects are rubbed together and become charged, what moves between them?	Electrons
14. What charge do electrons have?	Negative
15. What are the moving charges in metal conductors?	Electrons
16. A 6 V battery is joined to a lamp. The current is 2 A. What is the resistance of the lamp?	3Ohms
17. What happens to the resistance of a thermistor as the temperature rises?	Increases
18. What happens to the resistance of an LDR (light dependent resistor) as the light level increases?	Increases

 

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