Physics
Who among the following is credited to work for the unification of electricity, magnetism and optics field of Physics?

Michael Faraday
Haris Christian Oersted
Isaac Newton
James Clerk Maxwell

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Physics
It is easier to roll a stone up a sloping road than to lift it vertical upwards because

Work done in both is same but the rate of doing work is less in rolling.
Work done in rolling is more than in lifting.
Work done in lifting the stone is equal to rolling it.
Work done in rolling a stone is less than in lifting it.

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