The Satisfaction Academy

SPECIALIST OFFICER IT MCQ PRACTICE SETS 1. Which of the following pointing devices is NOT usually associated with a notebook computer? (1)    Touchpad (2)    Pointing stick (3)    Joystick (4)    Trackball 2. Which type of input device is used to copy contents of a piece of paper to a file, including both its text and graphics? (1)    Plotter (2)    MICR (3)    Scanner (4)    Bar code reader 3. The two basic forms of user interfaces are the __________ interface and the graphical user interface    (GUI).     1.Mac OS     2.Command-line 4. For which of the following reasons might you purchase an inkjet printer for your home computer? (1)    It can produce the best quality color output of all printer types designed for personal computers. (2)    It is an affordable printer with the ability to print colored text or images. (3)...

Ramp Generators Voltage and current linear ramp generator find wide application in instrumentation and communication systems. Linear ramp generators are also known as sweep generators, from basic building blocks of cathode ray oscilloscope and analog to digital converters. Linear current ramp generator are extensively used in television deflection systems. This topic consider the circuits employed in the generation of voltage and current sweeps. Ramp Generation Methods Although there are a number of methods of ramp generation, yet the following are important from the topic point of view. Exponential Charging In this method a capacitor is charged through a resistor to a voltage which is small in comparison with the supply voltage. Constant Current Charging In this method a capacitor is charged linearly from a constraint current source. Miller Integration In this method a constant current is approximated by maintaining nearly constant voltage across a fixed resistor i...