* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Learning Area
Printed circuit board wikipedia , lookup
Broadcast television systems wikipedia , lookup
Night vision device wikipedia , lookup
Surge protector wikipedia , lookup
Wien bridge oscillator wikipedia , lookup
Rectiverter wikipedia , lookup
Valve RF amplifier wikipedia , lookup
Transistor–transistor logic wikipedia , lookup
Regenerative circuit wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Flexible electronics wikipedia , lookup
Zobel network wikipedia , lookup
Index of electronics articles wikipedia , lookup
Electronic engineering wikipedia , lookup
RLC circuit wikipedia , lookup
Integrated circuit wikipedia , lookup
Surface-mount technology wikipedia , lookup
Educator and Tagging Information Learning Area: Technology Resource Name: Technology Assessment Exemplar Number: TECHN9.111 Item/s: 1 Phase: Senior Phase Grade: 9 Tags: Technology, systems and control, electrical systems, electronic circuits, devices, output, input, systems diagram, circuit, relay circuit, sensor, resistance, light sensor, sensing circuit, component, function, variable resistor, LDR, light-dependent resistor, preset resistor, diode, parallel, relay, worksheet, Formative Assessment Assessment Type: Formative Assessment Form/s: Worksheet Copyright for included material: N/A Duration: 60 min Learning Outcome(s) and Assessment Standard(s): Learning Outcome 2: Technological Knowledge and Understanding The learner will be able to understand and apply relevant technological knowledge ethically and responsibly. Assessment Standards We know this when the learner 3 Systems and Control 3.2 Demonstrates knowledge and understanding of how simple electronic circuits and devices are used to make an output respond to an input signal (e.g. resistors, light-emitting diodes, transistors, push or magnetic switches, thermistors, light-dependent resistors). Learning Space: Assessment Hyperlinks: To be completed later. Rating: Number of questions for exemplar: 1 Easy questions: Medium questions: Question 1 Difficult questions: Assessment Task Identifying systems 1.1 The systems diagram below shows how this circuit works when the daylight fades and a relay circuit turns on the street lights. 1.1.1 1.1.2 1.1.3 1.1.4 1.1.5 1.2 What is component A called? [2 marks] What is component B called? [2 marks] Which component is the one that behaves as a sensor? [2 marks] How does the resistance of this component change? [2 marks] Which component is used to adjust the sensitivity? [2 marks] The dark-sensing circuit shown above can be altered to detect light. Complete the next circuit by adding the light sensor. [6 marks] 1.3 1.4 What is the name of component C shown in the sensing circuit above? What is its function ? [2 marks] [2 marks] [20 marks] Suggested Solutions Question number 1 Possible marks 2 marks 2 marks 2 marks 2 marks 2 marks 6 marks 2 marks 2 marks Answers 1.1.1 Preset or variable resistor 1.1.2 Light-dependent resistor (LDR) 1.1.3 LDR 1.1.4 As the light fades, its resistance increases. 1.1.5 The preset resistor. 1.2 1.3 Diode 1.4 The diode will be placed in parallel to the relay and the opposite way around. When the circuit is turned off, the diode will protect the other components. [20 marks] Appendix of Assessment Tools