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QR Challenge: CHAPTER 8 ELECTRIC CURRENT section 1

Created using the ClassTools QR Treasure Hunt Generator

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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

3. Print out the QR codes.

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

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!

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.

Questions / Answers (teacher reference)

Question

Answer

1. 6. If a 100 Ω resistor is connected to 200 V, what is the current through the resistor? (I=V/R) 2 ampere
2. 7. If a current of 2 A flows through a 50 Ω resistor, what is the voltage across the resistor? (V=IR) 100 volt
3. 8. A 200-W light bulb is connected across a 100-V dc power supply. What current will flow through this bulb? 2 ampere
4. 9. A 100-W light bulb is operated by a 110-V dc source. What is the resistance of this bulb? 120 Ω
5. 10. A light bulb operating at a dc voltage of 100 V has a resistance of 200 Ω. How much power is dissipated in this bulb? 50 watt

 


CHAPTER 8 ELECTRIC CURRENT section 1: QR Challenge

https://www.classtools.net/QR/decode.php?text=6._If_a_100_Ω_resistor_is_connected_to_200_V,_what_is_the_current_through_the_resistor?_(I=V/R)

Question 1 (of 5)

 


CHAPTER 8 ELECTRIC CURRENT section 1: QR Challenge

https://www.classtools.net/QR/decode.php?text=7._If_a_current_of_2_A_flows_through_a_50_Ω_resistor,_what_is_the_voltage_across_the_resistor?_(V=IR)

Question 2 (of 5)

 


CHAPTER 8 ELECTRIC CURRENT section 1: QR Challenge

https://www.classtools.net/QR/decode.php?text=8._A_200-W_light_bulb_is_connected_across_a_100-V_dc_power_supply._What_current_will_flow_through_this_bulb?

Question 3 (of 5)

 


CHAPTER 8 ELECTRIC CURRENT section 1: QR Challenge

https://www.classtools.net/QR/decode.php?text=9._A_100-W_light_bulb_is_operated_by_a_110-V_dc_source._What_is_the_resistance_of_this_bulb?

Question 4 (of 5)

 


CHAPTER 8 ELECTRIC CURRENT section 1: QR Challenge

https://www.classtools.net/QR/decode.php?text=10.__A_light_bulb_operating_at_a_dc_voltage_of_100_V_has_a_resistance_of_200_Ω._How_much_power_is_dissipated_in_this_bulb?

Question 5 (of 5)