Description : What are the basic processes involved in fabricating ICs using planar technology?
Last Answer : 1.Silicon wafer (substrate) preparation 2.Epitaxial growth 3.Oxidation 4.Photolithography 5.Diffusion 6.Ion implantation 7.Isolation technique 8.Metallization 9.Assembly processing & packaging
Description : List the types of materials used in fabricating low-loss, long wavelength optical fibers.
Last Answer : Heavy-metal fluorides, chalcogenide glasses, and crystalline materials.
Description : How long should acrylic self-cure special trays been made prior to taking impression: A. 12 hrs B. Immediately after fabricating it C. After been left in water for an hour D. Wait for an hour before pouring
Last Answer : A. 12 hrs
Description : What are the elements of the solar system ?
Last Answer : Sun and its planets , satellites , asteroids , comets , meteors.
Description : A black surface absorbs more heat radiations as compared to a white or a reflecting surface under identical conditions. List two solar devices which make use of this property in their design. -Science
Last Answer : Solar cooker, solar water heater.
Description : Megha asked her mother to install a solar water heater on the roof top. Her mother asked about the need of such installation. Megha convinced her mother and succeeded in setting up a solar water ... Megha are reflected in her action? (iii) State one limitation in using solar water heater. -Science
Last Answer : (i) Advantage of solar water heater (any one) (a) Once solar water heater installed, the family and society never need to pay for heating up the water again. (b) Megha’s family and society ... night as well as on cloudy day. (b) Relatively low heating system efficiency of passive solar water.
Description : Why a solar cooker painted black form outside? -Science
Last Answer : Black surface absorbs more heat as compared to white or reflecting surface under identical conditions.
Description : Solar cooker takes more time as compared to the LPG to boil potato or rice, yet Kunal uses solar cooker for such type of cooking: (i) Why does Kunal uses Solar cooker instead of LPG? ... answer. (ii) Name the phenomenon which is responsible for obtaining high temperature in solar cooker. -Science
Last Answer : (a)(i) There are no energy losses while cooking on the solar cooker as the food gets cooked in a controlled environment whereas cooking on the LPG leads to maximum percentage of energy loss. ( ... saves a lot of prestigious time which is normally consumed for cooking purpose. (b) Greenhouse effect.