90 lines
4.8 KiB
YAML
90 lines
4.8 KiB
YAML
---
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metadata:
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display_name: Circuit Schematic Builder
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markdown: !!null
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data: |
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<problem>
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<p>
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Circuit schematic problems allow students to create virtual circuits by
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arranging elements such as voltage sources, capacitors, resistors, and
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MOSFETs on an interactive grid. The system evaluates a DC, AC, or
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transient analysis of the circuit.
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</p>
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<p>
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For more information, see
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<a href="https://docs.openedx.org/en/latest/educators/how-tos/course_development/exercise_tools/add_circuit_schematic_builder.html" target="_blank">
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Circuit Schematic Builder Problem</a> in <i>Building and Running an Open edX Course</i>.
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</p>
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<p>
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When you add the problem, be sure to select <strong>Settings</strong>
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to specify a <strong>Display Name</strong> and other values that apply.
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</p>
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<p>You can use the following example problems as models.</p>
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<schematicresponse>
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<p>Make a voltage divider that splits the provided voltage evenly.</p>
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<center>
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<schematic height="500" width="600" parts="g,r" analyses="dc"
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initial_value="[["v",[168,144,0],{"value":"dc(1)","_json_":0},["1","0"]],["r",[296,120,0],{"r":"1","_json_":1},["1","output"]],["L",[296,168,3],{"label":"output","_json_":2},["output"]],["w",[296,216,168,216]],["w",[168,216,168,192]],["w",[168,144,168,120]],["w",[168,120,296,120]],["g",[168,216,0],{"_json_":7},["0"]],["view",-67.49999999999994,-78.49999999999994,1.6000000000000003,"50","10","1G",null,"100","1","1000"]]"/>
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</center>
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<answer type="loncapa/python">
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dc_value = "dc analysis not found"
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for response in submission[0]:
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if response[0] == 'dc':
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for node in response[1:]:
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dc_value = node['output']
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if dc_value == .5:
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correct = ['correct']
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else:
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correct = ['incorrect']
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</answer>
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<solution>
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<div class="detailed-solution">
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<p>Explanation</p>
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<p>
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You can form a voltage divider that evenly divides the input
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voltage with two identically valued resistors, with the sampled
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voltage taken in between the two.
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</p>
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<p><img src="/static/images/voltage_divider.png" alt=""/></p>
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</div>
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</solution>
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</schematicresponse>
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<schematicresponse>
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<p>Make a high-pass filter.</p>
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<center>
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<schematic height="500" width="600" parts="g,r,s,c" analyses="ac"
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submit_analyses="{"ac":[["NodeA",1,9]]}"
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initial_value="[["v",[160,152,0],{"name":"v1","value":"sin(0,1,1,0,0)","_json_":0},["1","0"]],["w",[160,200,240,200]],["g",[160,200,0],{"_json_":2},["0"]],["L",[240,152,3],{"label":"NodeA","_json_":3},["NodeA"]],["s",[240,152,0],{"color":"cyan","offset":"0","_json_":4},["NodeA"]],["view",64.55878906250004,54.114697265625054,2.5000000000000004,"50","10","1G",null,"100","1","1000"]]"/>
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</center>
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<answer type="loncapa/python">
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ac_values = None
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for response in submission[0]:
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if response[0] == 'ac':
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for node in response[1:]:
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ac_values = node['NodeA']
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print("the ac analysis value:", ac_values)
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if ac_values == None:
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correct = ['incorrect']
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elif ac_values[0][1] < ac_values[1][1]:
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correct = ['correct']
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else:
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correct = ['incorrect']
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</answer>
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<solution>
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<div class="detailed-solution">
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<p>Explanation</p>
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<p>
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You can form a simple high-pass filter without any further
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constraints by simply putting a resistor in series with a
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capacitor. The actual values of the components do not really
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matter in this problem.
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</p>
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<p><img src="/static/images/high_pass_filter.png" alt=""/></p>
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</div>
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</solution>
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</schematicresponse>
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</problem>
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