<p>A voltage divider that evenly divides the input voltage can be formed with two identically valued resistors, with the sampled voltage taken in between the two.</p>
<p>You can form a voltage divider that evenly divides the input voltage with two identically valued resistors, with the sampled voltage taken in between the two.</p>
<p>A simple high-pass filter without any further constaints can be formed by simply putting a resister in series with a capacitor. The actual values of the components do not really matter in order to meet the constraints of the problem.</p>
<p>You can form a simple high-pass filter without any further constraints by simply putting a resistor in series with a capacitor. The actual values of the components do not really matter in this problem.</p>
Here's an example of a "Drag and Drop" question set. Click and drag each word in the scrollbar below, up to the numbered bucket which matches the number of letters in the word.
<p>
In drag and drop problems, students respond to a question by dragging text or objects to a specific location on an image.
<formulaequationinput size="40" label="Enter the equation"/>
</formularesponse>
<solution>
<div class="detailed-solution">
<p>Explanation</p>
<p>The mathematical summary of many of the theory of relativity developed by Einstein is that the amount of energy contained in a mass m is the mass time the speed of light squared.</p>
<p>As you can see with the formula entry, the answer is \(\frac{R_1*R_2}{R_3}\)</p>
<legend>What country is home to the Great Pyramid of Giza as well as the cities
of Cairo and Memphis? Click the country on the map below.</legend>
<imageresponse>
<imageinput src="https://studio.edx.org/c4x/edX/DemoX/asset/Dog-and-Cat.jpg" width="640" height="400" rectangle="(385,98)-(600,337)" alt="Two animals side by side. On the left, a brown furry animal with floppy ears and a large dark nose, on the right, a smaller furry animal with pointy ears and a small pink nose."/>
Custom JavaScript Problem</a> in <i>Building and Running an edX Course</i>.
</p>
<p>JavaScript developers shoud also see <a href="http://edx.readthedocs.org/projects/edx-developer-guide/en/latest/extending_platform/javascript.html" target="_blank">
Custom JavaScript Applications</a> in the <i>edX Developer's Guide</i>.</p>
<p>When you add the problem, be sure to select <strong>Settings</strong>
to specify a <strong>Display Name</strong> and other values that apply.</p>
<p>You can use the following example problem as a model.</p>
A multiple choice problem presents radio buttons for student input. Students can only select a single option presented. Multiple Choice questions have been the subject of many areas of research due to the early invention and adoption of bubble sheets.
One of the main elements that goes into a good multiple choice question is the existence of good distractors. That is, each of the alternate responses presented to the student should be the result of a plausible mistake that a student might make.
>>What Apple device competed with the portable CD player?<<
( ) The iPad
( ) Napster
(x) The iPod
( ) The vegetable peeler
Multiple choice problems allow learners to select only one option. Learners can see all the options along with the problem text.
When you add the problem, be sure to select Settings to specify a Display Name and other values that apply.
You can use the following example problem as a model.
>>Which of the following countries has the largest population?<<
( ) Brazil
( ) Germany
(x) Indonesia
( ) Russia
[explanation]
The release of the iPod allowed consumers to carry their entire music library with them in a format that did not rely on fragile and energy-intensive spinning disks.
According to September 2014 estimates:
The population of Indonesia is approximately 250 million.
The population of Brazil is approximately 200 million.
The population of Russia is approximately 146 million.
The population of Germany is approximately 81 million.
[explanation]
data:|
<problem>
<p>
A multiple choice problem presents radio buttons for student
input. Students can only select a single option presented. Multiple Choice questions have been the subject of many areas of research due to the early invention and adoption of bubble sheets.</p>
<p> One of the main elements that goes into a good multiple choice question is the existence of good distractors. That is, each of the alternate responses presented to the student should be the result of a plausible mistake that a student might make.
</p>
<p>What Apple device competed with the portable CD player?</p>
<multiplechoiceresponse>
<choicegroup type="MultipleChoice" label="What Apple device competed with the portable CD player?">
<p>The release of the iPod allowed consumers to carry their entire music library with them in a format that did not rely on fragile and energy-intensive spinning disks. </p>
</div>
</solution>
</problem>
<p>Multiple choice problems allow learners to select only one option.
Learners can see all the options along with the problem text.</p>
<p>When you add the problem, be sure to select <strong>Settings</strong>
to specify a <strong>Display Name</strong> and other values that apply.</p>
<p>You can use the following example problem as a model.</p>
<fieldset>
<legend>Which of the following countries has the largest population?</legend>
A numerical input problem accepts a line of text input from the student, and evaluates the input for correctness based on its numerical value.
In a numerical input problem, learners enter numbers or a specific and relatively simple mathematical expression. Learners enter the response in plain text, and the system then converts the text to a symbolic expression that learners can see below the response field.
The answer is correct if it is within a specified numerical tolerance of the expected answer.
The system can handle several types of characters, including basic operators, fractions, exponents, and common constants such as "i". You can refer learners to "Entering Mathematical and Scientific Expressions" in the edX Guide for Students for more information.
>>Enter the numerical value of Pi:<<
= 3.14159 +- .02
>>Enter the approximate value of 502*9:<<
= 4518 +- 15%
When you add the problem, be sure to select Settings to specify a Display Name and other values that apply.
>>Enter the number of fingers on a human hand<<
= 5
You can use the following example problems as models.
Pi, or the the ratio between a circle's circumference to its diameter, is an irrational number known to extreme precision. It is value is approximately equal to 3.14.
>>How many miles away from Earth is the sun? Use scientific notation to answer.<<
Although you can get an exact value by typing 502*9 into a calculator, the result will be close to 500*10, or 5,000. The grader accepts any response within 15% of the true value, 4518, so that you can use any estimation technique that you like.
= 9.3*10^6
or= 9.296*10^6
If you look at your hand, you can count that you have five fingers.
[explanation]
>>The square of what number is -100?<<
= 10*i
[explanation]
The sun is 93,000,000, or 9.3*10^6, miles away from Earth.
-100 is the square of 10 times the imaginary number, i.
[explanation]
data:|
<problem>
<p>
A numerical input problem accepts a line of text input from the
student, and evaluates the input for correctness based on its
numerical value.
</p>
<problem>
<p>In a numerical input problem, learners enter numbers or a specific and
relatively simple mathematical expression. Learners enter the response in
plain text, and the system then converts the text to a symbolic expression
that learners can see below the response field.</p>
<p>The system can handle several types of characters, including basic
operators, fractions, exponents, and common constants such as i. You can
<formulaequationinput label="Enter the numerical value of Pi" />
</numericalresponse>
</p>
<p>Enter the approximate value of 502*9:
<numericalresponse answer="$computed_response">
<responseparam type="tolerance" default="15%"/>
<formulaequationinput label="Enter the approximate value of 502 times 9"/>
</numericalresponse>
</p>
<fieldset>
<legend>How many miles away from Earth is the sun? Use scientific notation to answer.</legend>
<numericalresponse answer="9.3*10^6">
<formulaequationinput label="How many million miles are between Earth and the sun? Use scientific notation to answer." />
</numericalresponse>
</fieldset>
<p>Enter the number of fingers on a human hand:
<numericalresponse answer="5">
<formulaequationinput label="Enter the number of fingers on a human hand"/>
</numericalresponse>
</p>
<solution>
<div class="detailed-solution">
<p>Explanation</p>
<p>Pi, or the the ratio between a circle's circumference to its diameter, is an irrational number known to extreme precision. It is value is approximately equal to 3.14.</p>
<p>Although you can get an exact value by typing 502*9 into a calculator, the result will be close to 500*10, or 5,000. The grader accepts any response within 15% of the true value, 4518, so that you can use any estimation technique that you like.</p>
<p>If you look at your hand, you can count that you have five fingers.</p>
</div>
</solution>
</problem>
<fieldset>
<legend>The square of what number is -100?</legend>
<numericalresponse answer="10*i">
<formulaequationinput label="The square of what number is -100?" />
</numericalresponse>
</fieldset>
<solution>
<div class="detailed-solution">
<p>Explanation</p>
<p>The sun is 93,000,000, or 9.3*10^6, miles away from Earth.</p>
<p>-100 is the square of 10 times the imaginary number, i.</p>
Dropdown problems give a limited set of options for students to respond with, and present those options in a format that encourages them to search for a specific answer rather than being immediately presented with options from which to recognize the correct answer.
Dropdown problems allow learners to select only one option from a list of options.
The answer options and the identification of the correct answer is defined in the <b>optioninput</b> tag.
When you add the problem, be sure to select Settings to specify a Display Name and other values that apply.
>>Translation between Dropdown and __________ is extremely straightforward:<<
You can use the following example problem as a model.
[[(Multiple Choice), Text Input, Numerical Input, External Response, Image Response]]
Multiple Choice also allows students to select from a variety of pre-written responses, although the format makes it easier for students to read very long response options. Dropdowns also differ slightly because students are more likely to think of an answer and then search for it rather than relying purely on recognition to answer the question.
[explanation]
>>Which of the following countries celebrates its independence on August 15?<<
[[(India), Spain, China, Bermuda]]
[explanation]
India became an independent nation on August 15, 1947.
[explanation]
data:|
<problem>
<p>Dropdown problems give a limited set of options for students to respond with, and present those options
in a format that encourages them to search for a specific answer rather than being immediately presented with options from which to recognize the correct answer.</p>
<p>
The answer options and the identification of the correct answer is defined in the <b>optioninput</b> tag.
</p>
<p>Translation between Dropdown and __________ is extremely straightforward:
<optionresponse>
<optioninput options="('Multiple Choice','Text Input','Numerical Input','External Response','Image Response')" correct="Multiple Choice" label="Translation between Dropdown and __________ is extremely straightforward"></optioninput>
</optionresponse>
</p>
<solution>
<div class="detailed-solution">
<p>Explanation</p>
<p>Multiple Choice also allows students to select from a variety of pre-written responses, although the format makes it easier for students to read very long response options. Optionresponse also differs slightly because students are more likely to think of an answer and then search for it rather than relying purely on recognition to answer the question.</p>
</div>
</solution>
<p>Dropdown problems allow learners to select only one option from a list of options.</p>
<p>When you add the problem, be sure to select <strong>Settings</strong>
to specify a <strong>Display Name</strong> and other values that apply.</p>
<p>You can use the following example problem as a model.</p>
<fieldset>
<legend>Which of the following countries celebrates its independence on August 15?</legend>
A text input problem accepts a line of text from the student, and evaluates the input for correctness based on an expected answer.
The answer is correct if it matches every character of the expected answer. This can be a problem with international spelling, dates, or anything where the format of the answer is not clear.
>>Which US state has Lansing as its capital?<<
= Michigan
In text input problems, also known as "fill-in-the-blank" problems, learners enter text into a response field. The text can include letters and characters such as punctuation marks. The text that the learner enters must match your specified answer text exactly. You can specify more than one correct answer. Learners must enter a response that matches one of the correct answers exactly.
When you add the problem, be sure to select Settings to specify a Display Name and other values that apply.
You can use the following example problem as a model.
>>What was the first post-secondary school in China to allow both male and female students?<<
= Nanjing Higher Normal Institute
or= National Central University
or= Nanjing University
[explanation]
Lansing is the capital of Michigan, although it is not Michigan's largest city, or even the seat of the county in which it resides.
Nanjing Higher Normal Institute first admitted female students in 1920.
[explanation]
data:|
<problem>
<p>
A text input problem accepts a line of text from the
student, and evaluates the input for correctness based on an expected
answer.
</p>
<p>
The answer is correct if it matches every character of the expected answer. This can be a problem with international spelling, dates, or anything where the format of the answer is not clear.
</p>
<p>Which US state has Lansing as its capital? </p>
<stringresponse answer="Michigan" type="ci">
<textline size="20" label="Which US state has Lansing as its capital?"/>
</stringresponse>
<solution>
<div class="detailed-solution">
<p>Explanation</p>
<p>Lansing is the capital of Michigan, although it is not Michigan's largest city, or even the seat of the county in which it resides.</p>
</div>
</solution>
<p>In text input problems, also known as "fill-in-the-blank" problems,
learners enter text into a response field. The text that the learner enters
must match your specified answer text exactly. You can specify more than
one correct answer. Learners must enter a response that matches one of the
correct answers exactly.</p>
<p>When you add the problem, be sure to select <strong>Settings</strong>
to specify a <strong>Display Name</strong> and other values that apply.</p>
<p> You can use the following example problem as a model.</p>
<fieldset>
<legend>What was the first post-secondary school in China to allow both male and female students?</legend>
<stringresponse answer="Nanjing Higher Normal Institute" type="ci" >
<additional_answer>National Central University</additional_answer>
