What are the two main ways of generating electricity? How are they different from each other? Explain.
Name the non-metallic mineral which can be split easily into thin sheets. Mention its uses.
Mica is the non-metallic mineral which can be split easily into thin sheets.
Due to its excellent di-electric strength, low power loss factor, insulating properties and resistance to high voltage, mica is one of the most indispensable minerals used in electric and electronic industries.
Why are efficient means of transport pre-requisites for the fast development of the country? Explain.
Explain the conditions that were viewed as obstacles to the economic exchange and growth by the new commercial classes during the nineteenth century in Europe.
OR
How did students in Vietnam fight against the colonial government's efforts to prevent Vietnamese from qualifying for 'white collar jobs'? Explain.
Why did Gandhiji decide to launch a nationwide Satyagraha against the proposed Rowlatt Act, 1919? Explain.