1) A thermocouple element when taken from a liquid at 50 degreesCelsius and plunged into a liquid at 100 degrees celsius at timeequal to zero gave the following e.m.f. values. Determine the 95%response time. Time 0 20 40 60 80 100 120 e.m.f. (mV) 2.5 3.8 4.54.8 4.9 5.0 5.0
2) What are the advantages and disadvantages of a plastic filmtype of potentiometer and when compared with the wired-woundpotentiometer.
3) A shaft encoder is to be used with a 50 mm radius trackingwheel to monitor the linear displacement. If the encoder produces256 pluses per revolution, what will be the number of pulsesproduced by a linear displacement of 300 mm?.
4) Suggest a sensor that could be used, as part of a controlsystem, to determine the difference in level between twocontainers. The output is to provide an electrical signal for thecontrol system.
