Susan Brown

[Susan Brown]

Did you mean its not a motor its a valve that flushes the dispenser so it would be none for my answer?

That’s correct!

[Susan Brown]

Yes, that is.

So it looks like I calculate only the resistance of R2 when finding power

Yes – because we only wanted to know the heat generated by the load “R2” which has 40 ohms of resistance.

Current flow (the rate of electron movement) is determined by the total resistance in the circuit. It is not different at different points – it is the same at every point in the circuit.

But voltage drop and power will be different over different loads in series (unless the loads all have identical resistances)

[Susan Brown]

Yes, that is correct.

In a series circuit, the current is the same throughout the circuit – at any point you’ll measure the same amps. It is determined by the voltage (total dropped across the loads, which will be the same as the voltage supply) and the total resistance. So, 2 amps is correct.

Now, you know the current flowing through R2. You know the resistance of R2. Choose the right formula for P and you should get the right value for the heat (watts) generated by R2.

[Susan Brown]

Hi Leigh Anne,

The quiz question asks what the minimum temperature is

[Susan Brown]

You have a 120v circuit (L1-N) with two loads in series, R1 and R2. R1 = 20 ohms; R2 = 40 ohms. What is the heat generated by R2?

The first step is to find the circuit current, I. Do you know what it is?

[Susan Brown]

Hi Leigh Anne,
Good question!

Yes, you could do that, but there are a couple of things to keep in mind.

1.The only score we can see on our dashboard is the most recent one you’ve taken. So, if you accidentally scored lower on your second attempt, we would no longer see your first score. You can prevent this from interfering with earning Certification by archiving all of your emails with your quiz scores, so if you needed to, you could forward proof to me that you had a higher score on a first attempt.

2. We encourage you to understand the correct answers to as many of the quiz questions as possible before moving on in the course, both for the sake of the knowledge itself, but also to increase your chances of passing the Module Exam. Sometimes you can glance at a quiz result and realize what the correct answer is, without needing to retake it. But sometimes retaking the quiz is going to be more effective.

Hope that helps! Let me know if you have any other questions.

[Susan Brown]

See the “Volume Control” video in that unit, starting just after the 5 minute mark.

[Susan Brown]

Hi Denis,

First of all, have you read the summary of voltage and voltage drop at this pinned topic?
https://my.mastersamuraitech.com/appliance-repair-course-support/student-forums/topic/voltage-and-voltage-drop-summary/

Voltage drop is specifically the difference in charge that we measure across one or more loads when current is running through the circuit.

If current is not running through a load, then there will be no voltage difference across it.

Does that help? Read through those, and let me know if you have follow-up questions.

[Susan Brown]

Hi Zach,
Some of the units in Module 2 do not have quizzes. Instead, they just have the “mark as complete” buttons. If there is a quiz, it won’t let you move forward until you’ve taken it.

So – you’re all set!

[Susan Brown]

Since we’re discussing actual answers, I’ll reply to you via email 🙂

[Susan Brown]

My last gas cooktop had infinite switches 🙂

[Susan Brown]

Yes, each machine will have its own “key dance” to enter diagnostic mode, so the correct answer is, “Look it up on the tech sheet”

Let me know if you have any other questions.

[Susan Brown]

Okay!

[Susan Brown]

4 Megawatts is 4,000,000 watts (You can type 4 megawatts in your search engine to see how many zeros it has, if you forget that Mega means 6 zeros. Mega = million)

The possible answers are:
A. 400,000 watts
B. 400 kilo-watts
C. 0.004 Giga-watts

So A is obviously not right.
A kilo is 1000, so 400 kilowatts is 400,000 watts (add 3 zeros to the end of the 400). So also not right.
C. Must be it. Let’s see: a Gigawatt is 9 zeros, or 1 billion. 0.004 x 1 billion = 4,000,000. yes!

Occasionally you have to know these things – but you can use your search engine to help you do the conversions. It’s good to know how to do!

[Susan Brown]

Hi Yehoshua,

Read this topic and see if it helps. You haven’t gotten into parallel circuits yet, so don’t worry about that part.

If there is a particular quiz question you want me to step you through, let me know and I’m happy to.

https://my.mastersamuraitech.com/appliance-repair-course-support/student-forums/topic/voltage-and-voltage-drop-summary/

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