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QR Challenge: Basic Electricity

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. What is the name for the flow of electrons in an electric circuit?current
2. What is the basic unit of electric current?amperes
3. Which instrument would you use to measure electric current?ammeter
4. What limits the current that flows through a circuit for a particular applied voltage?resistor
5. What is the basic unit of resistance?ohms
6. True/False: The voltmeter is always connected in parallel across a component in a circuit.True
7. True/False: A closed circuit is the only condition necessary for an electric current to flow.True
8. What happens to the brightness of the light bulb when more cells are connected in series? Brighter/Dimmer? Dimmer
9. What happens to the ammeter reading when more cells are connected in series? Increases/decreases decreases
10. What do we call a number of cells connected in series?battery
11. The potential difference across the 15Ω resistor is 6 V. Calculate the current in the resistor.0.4A
12. Another 15Ω resistor is connected in series with the 15Ω resistor that is already in the circuit. What is the combined resistance of the two resistors in series (do not include units in this answer)?30
13. The element of a kettle is a resistor. Calculate the resistance of the element if a current of 1,5 A flows through it when the kettle is connected across a 240 V supply.(Do not include units in this answer)160
14. Calculate the potential difference of three cells in parallel. All the cells are 2 V cells.2V
15. Adding lightbulbs in series will cause the potential difference across the battery to (increase / decrease / remain the same)? remain the same

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_name_for_the_flow_of_electrons_in_an_electric_circuit?

Question 1 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_basic_unit_of_electric_current?

Question 2 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=Which_instrument_would_you_use_to_measure_electric_current?

Question 3 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_limits_the_current_that_flows_through_a_circuit_for_a_particular_applied_voltage?

Question 4 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_basic_unit_of_resistance?

Question 5 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=True/False:_The_voltmeter_is_always_connected_in_parallel_across_a_component_in_a_circuit.

Question 6 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=True/False:_A_closed_circuit_is_the_only_condition_necessary_for_an_electric_current_to_flow.

Question 7 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_happens_to_the_brightness_of_the_light_bulb_when_more_cells_are_connected_in_series?_Brighter/Dimmer?

Question 8 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_happens_to_the_ammeter_reading_when_more_cells_are_connected_in_series?_Increases/decreases

Question 9 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_do_we_call_a_number_of_cells_connected_in_series?

Question 10 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_potential_difference_across_the_15Ω_resistor_is_6_V.__Calculate_the_current_in_the_resistor.

Question 11 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=Another_15Ω_resistor_is_connected_in_series_with_the_15Ω_resistor_that_is_already_in_the_circuit._What_is_the_combined_resistance_of_the_two_resistors_in_series_(do_not_include_units_in_this_answer)?

Question 12 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_element_of_a_kettle_is_a_resistor._Calculate_the_resistance_of_the_element_if_a_current_of_1,5_A_flows_through_it_when_the_kettle_is_connected_across_a_240_V_supply.(Do_not_include_units_in_this_answer)

Question 13 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=Calculate_the_potential_difference_of_three_cells_in_parallel._All_the_cells_are_2_V_cells.

Question 14 (of 15)

 


Basic Electricity: QR Challenge

https://www.classtools.net/QR/decode.php?text=Adding_lightbulbs_in_series_will_cause_the_potential_difference_across_the_battery_to_(increase_/_decrease_/_remain_the_same)?

Question 15 (of 15)