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If they are for hearing then its output device as they are not putting anything in to the computer, if they have a microphone attached as well then they are input/output (i.e. microphone is input, speakers are output)
beacause the supply is the input and the output is the square wave
input-mouse,keyboard,scanner are input devices. output-monitor,printer,platter are output device in our daily life.
It will give high output when the given input is low and also give LOW output when the given input is high (Vice versa).
any instrument gives instanteneous result means no time lag in between the input and output, as you give the input you get the output there and then
the output of 7805 is 2v or 3v if we give the input as 2v or 3v.
Short both the inputs, if '0' is given as the input output will be '1' and if '1' is given as a input the output will be '0'
its oscillator.....
input devices put information in your computer and output devices give out info.Here is a more "elaborate" answer.Input Devices:KeyboardMouseStylusScannerDigital CameraOutput Devices:MonitorPrinterSpeakersKyeboard
Efficiency as a percent is output/input * 100%12000/15000 * 100% = 80% efficiency which makes sense, because it takes more work (input) than it give out (output). So the efficiency should be less than 100%.
The output voltage of a opamp when the input of inverting and non inverting terminals are grounded
Input unit of CPU needs instructions to carry out operations.Users must give the input.Hence we need input device. Output unit gives us the desired result.Hence we need the output device.It is the communication medium between user and the computer. Without input nd output units,there will not b a computer.