Questions

The strength of an electromagnet can be increased by increasing the cross-sectional area, increasing the number of turns, increasing current supply, increasing the length of the coiled wire.

The decentralization system was recommended by Balwant Rai Mehta.

Metamorphism is the method of changing the structure of a rock by using heat and temperature.

Hence, for this to happen the parent rock must be in solid form only. Therefore, option C) is true.

The fall of the Czar is known as February Revolution because, according to the old Russian calender, it occured on 27 February 1917.

The wide gap between the aims of the French Revolution(equality in economic, social and political life) and the actual conditions in France after revolution created serious discontent among the people. It led to an attempt to overthrow the existing government in France with a view to building a society based on socialist ideas. This attempt, known as Babeuf's conspiracy, is an important event in the history of socialism.

      The conspiracy,as the name indicates, was the work of Noel Babeuf. He was born in 1760 and has participated in the French Revolution . He organised a secret society called the 'Society of the Equals'.