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It is easier to roll a stone up a sloping road than to lift it vertical upwards because
work done in rolling is more than in lifting
work done in lifting the stone is equal to rolling it
work done in both is same but the rate of doing work is less in rolling
work done in rolling a stone is less than in lifting it

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Radiocarbon is produced in the atmosphere as a result of
collision between fast neutrons and nitrogen nuclei present in the atmosphere
action of ultraviolet light from the sun on atmospheric oxygen
action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
lightning discharge in atmosphere

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The absorption of ink by blotting paper involves
viscosity of ink
capillary action phenomenon
diffusion of ink through the blotting
siphon action

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Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
the heating effect of current alone
hysteresis loss alone
both the heating effect of current and hysteresis loss
intense sunlight at noon

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