# What is a function of a rectifier?

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# What artist(s) would you say influence your music the most?

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In Technology

# What is the function of the 4 diodes in a full wave rectifier?

The function of 4 diodes in a bridge full wave rectifier is to make the output unidirectional and to increase the efficiency of output

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# What is halfwave rectifier?

A device that converts full wave signal to half wave rectified dc signal. The device operates only for half of the input cycle during which the input signal is alllowed to pas…s and stops transmission of the signal for other half cycle. ok? (MORE)

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In Uncategorized

# Need of rectifier?

rectifier is important device in electronics or in process of converting alternating quantities into direct quantitydue to which we can easily convert AC INTO DC..............… (MORE)

In File Types

# The SIGN Function in Excel

Excel is an incredibly versatile program. It can be used to achieve very simple ends, such as recording your income each month; or it can be used for complex databases and dat…a analysis. Data that is entered into a spreadsheet can be processed and manipulated in many types of ways, thanks to Excel's extensive selection of functions. SIGN is one of Excel's simpler functions. It returns the sign of any whole number provided as an argument.Excel allows data to be processed in many ways thanks to a large selection of function types. Some functions are used regularly, such as SUM, which simply sums all the values in an array. Other functions have very specific applications, and are more likely to be used by developers. SIGN, despite being a very simple function to use, falls into the latter category. Returning the sign of a number will mainly be of use in complex mathematical processes."Sign" is a mathematical concept. All non-zero numbers have a sign. A number greater than zero is positive. A number less than zero is negative. Zero is signless. A number's sign is often denoted through the use of the plus symbol for positive numbers (+) and the minus symbol for negative numbers (-).SIGN is one of Excel's most basic functions. It is used to return the sign of a number. It accepts a single whole number as an argument. It will output one of three responses, based on the argument provided. If the argument evaluates to zero, then the function returns "0." If the argument evaluates to a negative value, the function returns "-1." If the argument evaluates to a positive value, the function returns "1." To insert the SIGN function into an open workbook file (spreadsheet), click on any cell to make it active. Type the function as: =SIGN([number]). The equals sign at the start of the function is important, as it lets Excel know that you have entered a function rather than a text string. The value of "number" is the argument you are evaluating. This could be a hard-coded number, or it could be a cell reference. It is also possible to use the SIGN function as an argument for other functions.As a simple example, imagine you have the value 50 in cell A1. To evaluate the sign of that value, you would use the formula: =SIGN(A1). The result would be "1," as the value is positive. If you want to, you can also use SIGN as part of more complex formulas. For example, if you want to convert the numerical output of SIGN into words, you could use a formula such as: =IF(SIGN(A1)=1,"positive","zero or less"). In this example, if the value of A1 is positive, the function will display the word "positive," otherwise it will display "zero or less."Excel has an incredibly diverse range of functions. Some of them are very useful in many situations, and you will find yourself using them often. Other functions have much narrower applications, and you may never need them at all. The SIGN function is very simple to use, as it accepts a single whole number as an argument, and then returns the sign of that number."Sign" is a mathematical concept. All non-zero numbers have a sign. A number greater than zero is positive. A number less than zero is negative. (MORE)

In Functions

# Master the Ceiling Function in MS Excel

Microsoft Excel spreadsheets are easy to use because of the many built-in functions. One such useful feature is the ceiling function. You can use it to round up numerical valu…es as desired. Its most common application is in dealing with prices, where nickels and pennies are rounded off to dimes.The ceiling function is used to round off a numerical value with or without a decimal part. You can specify the closest multiple to which the rounding off must be done. This is always done on the higher side by default. There are a maximum of three variables within this Excel function. Of these, only the first variable is mandatory.To apply the ceiling function to a particular cell in an Excel spreadsheet, type "= CEILING (number, significance)." The first variable inside the brackets is the numerical value that needs rounding off. The function's second variable is its significance; the number will be rounded off to the nearest multiple of this value. You can assign integer or decimal values to the significance variable. If no value is specified, a default value of 1 is used to round up the number to the nearest integer. Just like positive numbers, negative numbers are generally rounded off on the upper side, which is closer to zero. For example, -3.4 would be rounded off as -3. You can change this by assigning a value of 1 to a third variable, called mode. With this, the resultant value after rounding off will be -4. Note that the mode does not apply to positive numbers.You may not always remember the syntax of the ceiling function. The easier option is to choose it from the drop down menus provided in Excel. You need to choose "Math & Trig" from the menu, and then select "ceiling" from the list. The required function will open up in a dialog box. Here, you can replace its variables with the appropriate values. Once you have applied this function to a particular cell, it can be extended across that row or column by dragging the cell from its bottom-right corner.CEILING (43.63, 0.10) is an example showing how this function works. Its result will be 43.7 even though 43.63 is numerically closer to 43.6. Adding the mode variable as 1 to this function will not change its result. In the case of negative numbers, CEILING (-43.63, 0.10) will give you -43.6. Here, you can change the direction of rounding off by adding the mode. So, CEILING (-43.63, 0.10, 1) gives -43.7. Microsoft Excel's functions help you to work with numerical values in many ways. Trailing decimal places can get tedious, especially when their length varies between numbers. The ceiling function is very useful in rounding off these values to a fixed number of decimal places or to the nearest integer. You can then sum up the rounded numbers or use them in other formulae.Microsoft Excel's functions help you to work with numerical values in many ways. Trailing decimal places can get tedious, especially when their length varies between numbers. The ceiling function is very useful in rounding off these values to a fixed number of decimal places or to the nearest integer. (MORE)

In Functions

# How to Use the Excel WORKDAY Function

In Excel there are various functions. They perform analytical and mathematical calculations in a variety of categories. One such category is "Date & Time". All functions here …relate to determining or assessing date or time in some capacity. One under this category is the WORKDAY function. It returns the serial date when a start date and a number of days are entered as criteria.Double-click the Excel desktop or taskbar icon. If you do not have one, access the program from the Windows Start Menu. Search for it if needed. Once the workbook opens select the new option.Technically you do not need to save unless you want this book for later. It is a good idea, however, to stay in the habit of saving your workbooks before you begin work. To do so click on the floppy disk icon in the upper left-hand corner of the screen, find your file location, enter your filename, and press enter.Select cell A1. Enter the text "11/12/2013". Select cell A2. Enter the number "130".Select cell A3. Scroll to the ribbon. Click on the "Formulas" tab. Under the tab select the "Function Library". Scroll to "Date & Time" and click on it to reveal a drop down menu. From this menu select the WORKDAY function.The first line in the function window is "Start_date". This will be the beginning point from which the day count will proceed. On this line type A1, which will select cell A1.The second line for the function argument is "Days". On this line type A1, which will select cell A2. This will select the number "130". Press enter.In cell A3 the result "41772" has been returned. This is the serial date for the day occurring 130 days after 11/12/2013. Click on the A3 cell to reveal the code inside. You could manually enter this function with the given formula layout visible in cell A3.There is an easy way to change the format of the serial date. Click on cell A3. Scroll to the ribbon and select the home tab. On the home scroll to the left and look under the "Number" category. In here is a small window with an arrow for a drop-down menu. By default this windows shows "General". Click on the arrow to reveal the drop-down menu. Scroll to "Short Date" and select it. The number in cell A3 changes from 41772 to 5/13/2014.You now know how to use the Excel WORKDAY function. However, you may still be confused by the result of 41772. This result is the serial number used by Excel. It represents that number of days that have passed to the date in questions since 1/1/1900, which is the first serial date in Excel for Windows. You should have also noticed the function window allows you to enter dates for holidays. This allows you to account into these holidays and plan around them. For example, you could have entered 12/25/2013 for Christmas, and the result would have been pushed out one more day, making the final result 41773. This function is ideal when you need to plan a specific number of workdays to a project and want a specific end date.There are functions that carry similar properties to WORKDAY or perform related functions. WEEKNUM returns the actual week number in the year from the Microsoft serial number. WEEKDAY is very similar to WEEKNUM and returns the number value of the day based on the date. Other related functions include YEAR, TODAY, and WORKDAY.INTL. (MORE)

In Symptoms

# Impairment of Executive Function in ADHD

Executive function plays a key role in Attention Deficit Hyperactivity Disorder (ADHD). It is the part of our brains that orchestrates our actions and what we do. People with …ADHD have trouble with executive function, which manifests into many common ADHD symptoms. (MORE)

# 6 Easy Tips on Improving Executive Functioning Skills

Executive functions refers to the cognitive processes that manage the following skills: planning, working memory, attention, problem solving, verbal reasoning and other functi…ons. Individuals who have a deficit in executive functioning skills have difficulties in the area of organizing, planning, remembering details, paying attention and strategizing. Does your child need ways to improve their executive functioning skills? Here are some simple ways to strengthen their executive functioning skills at school and at home. Provide students with a homework folder and a classwork folder. Having two separate folders keeps their work more organized. Students are clear in knowing what needs to go in each folder. Assigning color coded folders for each subject is also beneficial for them too. Post class schedules so students with deficits in executive functioning skills can see them. Teachers should also review the daily schedules with the student. At home, post the weekly homework schedule in an area that they can see on a daily basis. This is especially important for long term project due dates. In the classroom, the teacher should breakdown the directions for students. Short and simple instructions make it easier to remember details. At home, parents can help children by breaking down multi-step homework instructions. Create a checklist of your student's daily tasks. When a task is complete they can check it off the list. At home this could be helpful when doing homework or projects. Students should keep the check list in their homework area so they can refer to it while doing homework and projects. In the classroom, students should sit in an area that has minimal distractions. This can improve their focusing skills. At home, children should have an area that is organized and away from noise and other distractions. Help your child keep his backpack neat. On a daily basis have your child clean out his backpack and remove all unnecessary papers. Have them unpack their backpack in front of you so you can model the process. Eventually, they will be able to do this on their own. Executive functioning skills are crucial to learning. Individuals with deficits in executive functioning skills can also experience issues with self-esteem, anxiety and some times misbehavior. Students with deficits in executive functioning skills have difficulty with organization, paying attention, remembering details and planning. Give them the tools they need to improve their executive functioning skills by implementing these easy tips. Soon their forgetfulness, disorganization and inattentiveness will be a thing of the past! (MORE)

In Behaviors

# Why Is It Difficult for Those with Autism to Complete Tasks or Meet Goals?

It is often difficult to for those with autism spectrum disorders to work towards goals. This difficulty can be explained by the inability to sustain problem solving capabilit…ies—part of the job of our executive functioning system. In those with autism this system can be inhibited. Executive Dysfunction or a deficit in executive functioning is a one of the [core deficits](http://autism.answers.com/autism-awareness/three-core-deficits-of-aspergers-syndrome-autism) of Autism Spectrum Disorders, or Asperger's Syndrome. Executive Function is an important self-regulatory system that when in deficit, makes it difficult to take steps towards a goal while incorporating information and making adjustments along the way. Executive Functioning is what gives us the capability for self-control which allows us to sustain problem solving directed towards a goal—the brain function responsible for goal-directed problem solving, and goal-directed persistence. Those living with executive dysfunction often have difficulty reaching goals. Goal reaching issues can best be understood when likened to sensory processing issues, which may be related both functions being performed in the frontal cortex of the brain. For example, with auditory processing issues, the auditory system seems to be unable to filter out background noise, or hone in on a particular sound when required. There is no filter; everything is comes at you at the same time, fawning for your attention—now. There is no hierarchy of importance in these sounds, meaning the sound of a voice speaking to you is of the same importance to your auditory system as the sounds of the traffic in the background, and, therefore, seemingly as loud and distracting. A person's voice blends into the backgrounds sounds, often becoming disorienting, and making all the sounds and words blend together. This is particularly problematic if stressed, distracted, or overloaded in any way.Making progress towards goals is very similar to this experience when you live with executive dysfunction. All the steps required to make progress towards a specific goal gets jumbled together.The autistic person will often have trouble deciding what to do next (sequencing) in order to move themselves closer to the goal because all the tasks needed to be completed, are of equal importance (prioritizing), and need their attention—now (no filter). This inability to sequence and prioritize effectively often results in not being able to complete a project/goal.Working in a quiet environment where you are less likely to be interrupted can help with maintaining focus on sequencing and working towards goals and projects. Keeping detailed lists, and prioritizing those lists ahead of time will help give your task direction and allow you to not have to rely on working short-term memory to keep track of the next task in the sequence. With proper planning, assistance, and minimal distractions many of the executive functioning issues that a person with autism experiences can be overcome. Impairment of Executive Functioning can be one of the reasons it is difficult for those with autism to work towards and reach their goals, and is one of the [core deficits](http://autism.answers.com/autism-awareness/three-core-deficits-of-aspergers-syndrome-autism) of individuals who have autism spectrum disorders. It is important to remember that autistic individuals are detail oriented and sometimes lose sight of the whole picture, project, or goal—something known as weak central coherence. This coupled with executive functioning difficulties can make working towards goals and projects, or "keeping their eye on the ball" difficult. In some cases, medication to help with executive functioning can help, as well as, other coping strategies such as making and prioritizing lists ahead of time, minimalizing distractions, and asking for assistance when needed. (MORE)

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# Types of rectifier?

There are basically two types of rectifiers one is the half wave rectifier and the other is the full wave rectifies. The full wave rectifier is further classified into two typ…es namely the bridge rectifier and the center tapped rectifier.There are also silicon controlled rectifiers nowadays. (MORE)

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In Technology

# Where can be rectifiers be used?

One place is in telecommunication racks, where AC power needs to be converted to DC to power the telecommunication equipment. And their are plenty of other applications as wel…l. (MORE)

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# What does a rectifier bridge do?

Imagine a rectifier as a valve that only allows electrical current to flow in one direction. When using a single rectifier you end up with half of the wave cycle being cut off… (when the cycle turns negative). In many applications a full wave rectifier would be far more desirable. By configuring four of the rectifiers it is possible to make what's called a full wave "bridge". The link below shows how a full wave bridge works. http://hyperphysics.phy-astr.gsu.edu/Hbase/electronic/rectbr.html ANSWER: It will rectify the input into pulsating DC of twice the input frequency minus two diodes drop 1.4 volts (MORE)