The Rectifier is an electronic device, which converts an AC waveform(Usually a Bi-directional waveform with Zero Average value) to a Pulsating DC waveform (Uni-directional waveform with Nonzero Average value).
As AC wave (Sinusoidal) has two half cycles, namely -
Positive Half cycle & Negative Half cycle
If a Rectifier does it's operation only in one half of the cycles, it is known as Half Wave Rectifier.
Similarly, If a Rectifier does it's operation in both the half cycles, it is known as Full Wave Rectifier.
In a simple half-wave rectifier, during the positive part of the alternating wave the diode conducts, making the load voltage equal to the supply voltage. During the negative …part of the alternating wave he diode blocks, making the load voltage zero. Another explanation For as long as its circuit is alive, any sine wave signal running at a certain frequency has the positive part of its wave immediately followed by the negative part of its wave immediately followed by another positive part of its wave, and so on. A half-wave rectifier would basically eliminate the negative part so the output of the rectifier, as seen by the load that is connected to it, would receive a positive half wave voltage then a zero voltage during the negative half cycle of the waveform, then a positive half cycle again, and so forth. A full wave rectifier does the same thing for the positive half of the cycle and then basically flips the negative part of the waveform to give the same output as the positive part, so you have a series of positive pulses. The signal, as seen by the load after the rectifier, never goes negative.(MORE)
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)
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 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)
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)
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)
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)
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.htmlANSWER: It will rectify the input into pulsating DC of twice the input frequency minus two diodes drop 1.4 volts(MORE)
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