It’s been almost 2 years since the last electronics related quiz, so it’s time for our third installment! As before, the quiz is here to assess your knowledge, perhaps help you learn something along the way, and most of all, have some fun.

This electronics quiz will be similar to the last.

The answers to all the questions in this quiz are hiding in the various blog posts on this site.

As usual, the questions aren’t engineering level questions and aren’t terribly difficult. For some, you may know the answer right away; for others you may need to browse some of the posts to find an answer.

Hint: the search box is your helpful friend.

And, if you find yourself reading a post, be sure to leave your thoughts and suggestions in the comments section.

First, you’ll see the questions.

There are 12 questions. After the last one, I’ll post the answers to each question with an explanation (or I’ll work the problem out, if appropriate). I’ll also post a link to the appropriate post with each answer.

Ready to go?

Remember, no cheating!

Now let’s test your electrical knowledge once again…

 

Electronics Quiz #3

1) Another name for a band reject filter is a ______________________ filter.

2) A BJT in saturation is comparable to this common mechanical device (2 words) _____________  _______________.

3) Array indices in C programming start at what number?

4) OBD II has been required in cars sold in the U.S. since what year?

5) Normally, voltage and current are:

a) Inversely proportional
b) Good friends
c) Proportional
d) A hot mess

6) In C programming, what’s the difference between = and == ?

7) You want your robot to be able to sense shock and sound an alarm. That way you’ll know if your sadistic sibling kicks it. One sensor you might use for this is a ________________________________.

8) Servo motors rely on _______________ to position themselves correctly.

9) LEDs don’t like too much current and should always have a resistor in series with them. How much current flows though the LED in figure 1? Assume a 5 V source, a 0.7 V drop across the LED, and that the resistor = 240 Ω.

 

 

 

 

 

 

 

 

10) There is one type of control structure that you’ll often pair with arrays in C programming. What is it?

11) MOSFETs are controlled by ____________ while BJTs are controlled by__________________.

12) The number of other gates a particular logic gate can drive at its output is its ________________________.

 

Congratulations!

You survived electronics quiz 3. To keep everyone honest, the answers are written in invisible ink. To reveal them, simply highlight the area below with your mouse. This is a little trickier on a phone or tablet, but you’re smart, so you’ll figure it out.

Ever dreamed of being Iron Man, having the ability to build anything, anytime? Try Academy for Arduino!

Electronics Quiz #3 Answers

1) Another name for a band reject filter is a notch filter.

Post: Intro to Electrical Filters

2) A BJT in saturation acts like a closed switch.

Post: An Introduction to Transistors

3) Array indices start at 0 in C.

Post: C Programming Tutorial 6: Intro to Arrays in C

4) 1996.

Post: How OBD-II Vehicle Diagnostics Work

5) c) Proportional. But voltage and current have been known to get along well.

Post: Back to the Basics: What is Voltage?

6) In C, the = is the assignment operator which assigns a certain value to a variable. The == is the equality operator which finds use in comparisons and statements such as

if (year == 2020)
//do something fun
else
//sleep until 2020

Post: C Programming Tutorial 3: Arithmetic & Logic in C

7) Use an accelerometer. They often come with a gyroscope in the same package.

Post: Intro to Common Sensors You’ll Use in Your Projects

8) Feedback. Servos need to know their current position and how far they’ve moved to get to the right spot. Feedback accomplishes this.

Post: An Introduction to Servo Motors

9) This is a series circuit, so the same amount of current will flow through the resistor and the LED. Because 0.7 V drops across the LED, we know that 4.3 V drops across the resistor. Using this information, we get the current through the LED:
I = V/R = 4.3/240 = 17.9 mA.

Post: Simple Circuit Analysis Techniques You Should Know

10) for loops and arrays are a match from heaven and are perfect for each other.

Post: C Programming Tutorial 6: Intro to Arrays in C

11) MOSFETs are controlled by voltage while BJTs are controlled by current.

Post: An Introduction to Transistors

12) The number of other gates a particular logic gate can drive at its output is its fanout.
Logic gates are electrical devices with finite current-driving capabilities. Because of this, there is a limit to the amount of gates a given logic gate can drive.

Post: Tutorial on Logic Gates Part 2: Electrical Properties of Gates

 

How’d You Do on Electronics Quiz #3?

So, if you read (or at least skimmed) the right posts, you should have scored 100%, regardless of your level of electronics experience. If you scored an A or a B without reading or skimming any of the posts, props to you!

Like last time, because all the answers are freely available on this blog, I won’t use a grading scale like I did with the first quiz. If you didn’t score 100%, go back and read the appropriate posts.

Were the questions too easy? Too hard? Were there too many or too few questions?

Leave us a comment and tell us how you did and your thoughts!

Ever dreamed of being Iron Man, having the ability to build anything, anytime? Try Academy for Arduino!