# Light bulb problem solving question. Basic Circuit Troubleshooting Worksheet 2022-10-31

Light bulb problem solving question Rating: 7,8/10 1817 reviews

The light bulb problem solving question is a classic example of how to approach a problem in a logical and systematic way. It goes like this:

Imagine you are in a room with three switches, each of which controls one of three light bulbs in a separate room. You are allowed to go into the room with the light bulbs only once, and you are not allowed to see the bulbs while they are off. The question is, how do you determine which switch controls which light bulb?

One approach to solving this problem is to start by testing each switch individually. First, turn on switch number one and leave it on for a minute or so. Then, go into the room with the light bulbs and see which one is on. Turn that light bulb off and leave the room. Then, repeat this process for switches two and three. This method will allow you to determine which switch controls which light bulb, but it will take three separate trips into the room with the light bulbs.

Another approach is to use a process of elimination. First, turn on switch number one and leave it on for a minute or so. Then, turn on switch number two and leave it on for a minute or so. Go into the room with the light bulbs and see which ones are on. If both light bulbs are on, then switch number three must control the remaining light bulb. If only one light bulb is on, then that light bulb is controlled by the switch that is still turned off. This method will also allow you to determine which switch controls which light bulb, but it will only require one trip into the room with the light bulbs.

There are other methods that could be used to solve this problem, but the important thing is to approach it in a logical and systematic way. By breaking the problem down into smaller steps and following a logical process, it is possible to find a solution even if you are not familiar with the specific details of the problem. This type of problem solving is useful in many different fields and can be applied to a wide range of problems, from technical issues to everyday challenges.

## Cognitive Psych Ch. 12 (Problem Solving) Book Questions

This takes another 10 minutes. This corroded connection now has a high resistance instead of a low resistance as it should. Whichever of the other two is warm to the touch is connected to the second switch. Numeracy Problems Numeracy concerns can also be a kind of logical query you might find. This post is for the students of Mathematical Curiosities, the Creative Math Live There are hundred bulbs in a room, which are all initially turned off. It might be that some students get the right answer s for the wrong reasons, so it is good to explore the reasoning for each answer.

Next

## Interview Logical Questions With Answers

What is the law? Using a variety of questions will also help the interviewer to understand how you handle unfamiliar situations and overcome problems. Switch 2 is able to control lamp 2, but lamp 1 never comes on no matter what is done with switch 1: Identify which of these hypothetical faults could account for this problem, and which could not account for the problem. The presence of voltage between TB2-1 and TB2-3 narrows the possibility of failure in the circuit quite a bit. Next, try out these. Consider asking the interviewer for this detail, or whether the inferred values are supposed to be used. You are only allowed to go into the room once. Answer: Turn on the first two switches.

Next

## The light bulb problem

What can be said about resistors A and B? As a result, the light bulb does not energize when the switch is turned ON: Taking voltage measurements with a voltmeter, how do you think this corrosion problem will reveal itself with the switch on the ON position? Finke used the term preventive forms to describe the. The result of this single measurement indicates which half of the circuit there is a definite problem in. So when prepping for a software interview, be weary of these kinds of questions! What is the resistance of resistors 1 and 2? Example 5 : In a circuit, the potential drop across the 10 kΩ -resistor is 100 V. When the switch is closed, the lamp does not turn on: Identify which of these hypothetical faults could account for this problem, and which could not account for the problem. For each fault scenario it is important to ask your students why they think it is possible or not possible.

Next

## 3 Bulbs and 3 Switches

Holly was in her mother-in-law's kitchen preparing lunch for her family. Now, We want to solve some practice problems to show you how to use ohm's law to solve electricity problems. This takes another 2 minutes. Leave them on for five minutes. Question: If the voltage across a circuit becomes five times, then what would the current through the circuit be? Switch 1 is able to control lamp 1, but lamp 2 never comes on no matter what is done with switch 2: Identify which of these hypothetical faults could account for this problem, and which could not account for the problem. .

Next

## 58 Brain Teasers with Answers: Brain Teasers That Will Stump You

Each sequence of numbers is a verbal representation of the sequence before it. These forms of questions are a riddle that you are expected to answer. Answer: Yes, they can cross in exactly 15 minutes. He tells them something; then the brothers leap onto the camels and charge toward the finish line. Question 11 Suppose this battery and light bulb circuit failed to work: Using a voltmeter, a technician measures 0 volts between the points C and H. Question 1 Determine if the light bulb will de-energize for each of the following breaks in the circuit. .

Next

## Introducing to Problem Solving class 11 Sumita Arora Solution

Thus, an increase in voltage causes an increase in the current through the resistor, and as a result, the lightbulb shines brighter. You might want them to identify which points in this circuit are electrically common to one another in either or both switch positions. To calculate the area and the circumference of circles. Therefore, the current also increases five times to maintain the resistance of the circuit constant. The final step documenting replacement of the wire between TB2-1 and TB2-2, while not essential, is not really wasted, either. Polar bears are the only bears that live at the North Pole, and they are white. There is a door, yet no entrance or exit.

Next

## Basic Circuit Troubleshooting Worksheet

Now, find the resistance of resistors 1 and 2. I will let you determine which points in the circuit you may measure switch voltage between. During the race, the two brothers wander aimlessly for days, neither willing to cross the finish line. This takes 3 minutes. Hiring managers are far more interested in your problem-solving experience than they are in learning how you can personally fight a bear.

Next

## Ohm's Law Practice Problems With Solutions for High School

The door on the left leads to a pit of lava. Once they created an object they were given the name of an object category and instructed to interpret their creation as a practical object or device within that category. Then, I will fill the three-gallon jug again, then fill the five-gallon jug all the way up to capacity. Notes: A circuit like this is very easy to construct, and makes for an excellent classroom demonstration piece. There is pepper, but no salt.

Next

## Microsoft Interview Puzzle

The door in the center leads to a room filled with deadly gas. Consider asking the interviewer for this detail, or whether the inferred values are supposed to be used. The switches control three light bulbs on the other side of the door. The fox is four times faster than the duck. Puzzle: There are 5 pirates in a ship. In desperation, they ask a wise man for advice.

Next