Science and Technology II · Textbook solutions

Towards Green Energy

Every solved example, exercise, and miscellaneous question — in the order the textbook teaches them. · 29 questions

Exercise

29 q
  1. Ex Q1
    Remake the table taking into account relation between entries in three columns.
    IIIIII
    CoalPotential energyWind electricity plant
    UraniumKinetic EnergyHydro electric plant
    Water ReservoirNuclear EnergyThermal plant
    WindThermal EnergyNuclear power plant
  2. Ex Q2
    Which fuel is used in thermal power plant? What are the problems associated with this type of power generation?
  3. Ex Q3
    Other than thermal power plant, which power plants use thermal energy for power generation? In what different ways is the thermal energy obtained?
  4. Ex Q4
    Which type/types of power generation involve maximum number of steps of energy conversion? In which power generation is the number minimum?
  5. Solve the following crossword puzzle.
    Ex Q5(a)
    Maximum energy generation in India is done using..... energy.
  6. Ex Q5(b)
    ...... energy is a renewable source of energy
  7. Ex Q5(c)
    Solar energy can be called.... energy.
  8. Ex Q5(d)
    .... energy of wind is used in wind mills.
  9. Ex Q5(e)
    ..... energy of water in dams is used for generation of electricity.
  10. Explain the difference.
    Ex Q6(a)
    Conventional and Non-conventional Sources of energy.
  11. Ex Q6(b)
    Thermal electricity generation and solar thermal electricity generation.
  12. Ex Q7
    What is meant by green energy? Which energy sources can be called as green energy sources and why? Give example.
  13. Explain the following sentences.
    Ex Q8(a)
    Energy obtained from fossil fuels is not green energy.
  14. Ex Q8(b)
    Saving energy is the need of the hour.
  15. Answer the following questions.
    Ex Q9(a)
    How can we get the required amount of energy by connecting solar panels?
  16. Ex Q9(b)
    What are the advantages and limitations of solar energy?
  17. Explain with diagram step-by-step energy conversion in
    Ex Q10(a)
    Thermal power plant
  18. Ex Q10(b)
    Nuclear Power Plant
  19. Ex Q10(c)
    Solar thermal power plant
  20. Ex Q10(d)
    Hydroelectric power plant
  21. Give scientific reasons
    Ex Q11(a)
    The construction of turbine is different for different types of power plants.
  22. Ex Q11(b)
    It is absolutely necessary to control the fission reaction in nuclear power plants.
  23. Ex Q11(c)
    Hydroelectric energy, solar energy and wind energy are called renewable energies.
  24. Ex Q11(d)
    It is possible to produce energy from mW to MW using solar photovoltaic cells.
  25. Ex Q12
    Draw a schematic diagram of solar thermal electric energy generation.
  26. Ex Q13
    Give your opinion about whether hydroelectric plants are environment friendly or not?
  27. Draw neat and labelled diagrams.
    Ex Q14(a)
    Energy transformation in solar thermal electric energy generation.
  28. Ex Q14(b)
    One solar panel produces a potential difference of 18 V and current of 3A. Describe how you can obtain a potential difference of 72 Volts and current of 9 A with a solar array using solar panels. You can use sign of a battery for a solar panel.
  29. Ex Q15
    Write short note on Electrical energy generation and environment.