How does the doping increase the conductivity of intrinsic semiconductor? These delocalized electrons increase the conductivity of doped silicon due to the negatively charged electron, hence silicon doped with electron-rich impurity is called n-type semiconductor while electron-deficit impurities increase the conductivity through positive holes and this type of semiconductors are called p- … How does […]
What does P controller do?
What does P controller do? In the proportional control algorithm, the controller output is proportional to the error signal, which is the difference between the setpoint and the process variable. In other words, the output of a proportional controller is the multiplication product of the error signal and the proportional gain. Why PID controller is […]
What are the groups of living things?
What are the groups of living things? Living things can be grouped into five main groups called kingdoms: plants, animals, fungi, Protoctista and Monera. The last two are made up of micro- organisms, which are often called microbes, such as bacteria. What are all living things in an area called? An ecosystem is a biological […]
What is nameplate voltage?
What is nameplate voltage? Voltage. Nameplate-defined parameters for the motor such as power factor, efficiency, torque and current are at rated voltage and frequency. When the motor is used at other voltages than the voltage indicated on the nameplate, its performance will be affected. How do you calculate motor current rating? “Now the formula,which you […]
What causes low pressure in HVAC?
What causes low pressure in HVAC? The two most common causes of low head pressure at an air conditioner or heat pump compressor motor are: Refrigerant under-charge, due to a refrigerant leak or improper charge. TXV (TEV) malfunction, over-metering refrigerant. What is a low pressure HVAC system? The low pressure switch monitors the refrigeration system […]
How do construction sites store materials?
How do construction sites store materials? Storage at height – if materials are stored at height eg on top of a container, make sure necessary guard rails are in place if people could fall when stacking or collecting materials or equipment; Tidyness – keep all storage areas tidy, whether in the main compound or on […]
What is the difference between macronutrients and micronutrients?
What is the difference between macronutrients and micronutrients? Macronutrients are big picture nutrition categories, such as carbohydrates, fats, and proteins. Micronutrients are smaller nutritional categories, such as individual vitamins and minerals like calcium, zinc, and vitamin B-6. You may have heard the phrase “counting macros” at some point. What is the importance of macronutrients and […]
How do welds fail?
How do welds fail? Insufficient weld size — because of design errors or incorrect interpretation of the part design – can lead to weld failures. A weld that is too small or too short for the application can fail from tension, compression, bending or torsional loads. What are common welding defects? So below we’ll learn […]
What do they ask you to do during a driving test?
What do they ask you to do during a driving test? Some of the required maneuvers include: Following other traffic. Starting your vehicle. Merging to traffic. Backing up. Parallel parking. Making a U-turn. Pulling over to the side of the road and stopping. Moving away from a parked position onto the road. What do I […]
How do you calculate the evaporation rate of water?
How do you calculate the evaporation rate of water? I did my own research, and according to The Engineering Toolbox,the formula for the evaporation rate of water is as follows: gh=ΘA(xs−x) gh = amount of evaporated water per hour (kg/h) Θ=(25+19v) = evaporation coefficient (kg/(m2 h)) v = velocity of air above the water surface […]