During TEM, a vacuum is created inside the                                                    

Related MCQs

• TEM and SEM are the same microscopy techniques.
• The resolving power of TEM is derived from                                
• The resolution attainable with standard TEM is less than the theoretical value.
• Which of the following component of TEM focuses the beam of electrons on the sample?
• Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure?
• “Radiation cannot be affected through vacuum or space devoid of any matter”. True or false
• Which of the following loss occurs inside the fibre?
• A water-heater is covered with insulation boards over a total surface area of 3 m2. The inside board surface is at 75°C and the outside being at 20°C and the conductivity of material being 0.08 W/m K. Find the thickness of board to limit the heat transfer loss to 200 W ?
• A small light bulb (25 W) inside a refrigerator is kept on and 50 W of energy from the outside seeps into the refrigerated space. How much of temperature difference to the ambient(at 20°C) must the refrigerator have in its heat exchanger having an area of 1 m2 and heat transfer coefficient of 15 W/Km2 to reject the leak of energy.
• A water-heater is covered up with insulation boards over a total surface area of 3 m2. The inside board surface is at 75°C and the outside surface is at 20°C and the board material has a conductivity of 0.08 W/m K. How thick a board should it be to limit the heat transfer loss to 200 W ?