16/12/2019Thermal/Heat Energy (STUDY BY TOPICS JUNIOR CLASS) 0Comments by Gate Academy Welcome to your Thermal/Heat Energy (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. The process of producing energy by utilizing heat trapped inside the earth surface is called ___Solar energyHydrothermal energyWave energyGeo-Thermal energy2. The ability or capacity to do work is calledstrengthenergypowerforce3. In a vacuum, heat can travel by:convection onlyradiation onlyconduction onlyradiation and convection4. The heat from a fire at one end of a closed room reaches some one at the other end of the room mainly byreflectiondiffusionradiationconduction5. At a common temperature, a block of wood and a block of metal feel equally cold or hot. The temperatures of block and wood are ___________Greater than the temperature of the bodyHas no changeLess than the temperature of the bodyEqual to the temperature of the body6. The sound wave moves faster inalcoholsolidvacuumairwater7. Woollen clothes keep the body warm because of wool ___________Is a bad conductorHas no effectIncreases the temperature of bodyDecreases the temperature8. black body is at 727°C. It emits energy at a rate, which is proportional to ___________(727)2(727)4(1000)2(1000)49. Which of the following represents the energy in storage?workheatnone of the mentionedinternal energy10. On increasing the temperature of a substance gradually, its colour becomes ___________WhiteRedYellowGreen11. What is hot molten rock called?Igneous rocksLavaMagmaVolcano12. A pressure cooker reduces cooking time for food, because _______The higher pressure inside the cooker crushes the food materialCooking involves chemical changes helped by a rise in temperatureBoiling point of water involved in cooking is increasedHeat is more evenly distributed in the cooking space13. When a torch is used to light up a dark room what energy conversions are likely to take place?Electrical to chemicalElectrical to heatElectrical to lightChemical to light14. Electricity or electric current is theenergy supplied to a wiremovement of atoms through a wireflow of energy in a wireflow of electrons in a wire15. Which of the following groups is all insulatorsglass, plastic, paperrubber, copper, ironiron, plastic, glassgraphite, paper, rubber16. Energy stored in foods and fuels is calledsound energyelectrical energychemical energylight energyheat energy17. In an electric motorElectrical energy is converted into heat energyChemical energy is converted into electrical energyElectrical energy is converted into sound energyElectrical energy is converted to Mechanical energy18. Heat current is maximum in which of the following?Steel and copperCopperCopper and steelSteel19. Heat transfer and work transfer areboundary phenomenaall of the mentionedenergy in the transitenergy interactions20. Which of the following is a type of energy?high grade energynone of the mentionedboth of the mentionedlow grade energy21 out of 20Time is Up!
