Physics - Study Mode
[#1081] It is easier to roll a stone up a sloping road than to lift it vertical upwards because
Correct Answer
(D) Work done in rolling a stone is less than in lifting it.
Explanation
Solution: It is easier to roll a stone up a sloping road than to lift it vertical upwards because work done in rolling a stone is less than in lifting it.
[#1082] The absorption of ink by blotting paper involves:
Correct Answer
(B) Capillary action phenomenon
Explanation
Solution: The absorption of ink by blotting paper involves capillary action phenomenon because the blotting paper is a thin and a smooth paper which allows a little thicker liquids like ink to absorb.
[#1083] Siphon will fail to work if:
Correct Answer
(B) The level of the liquid in the two vessels are at the same height.
Explanation
Solution: Siphon is a tube bent to form two legs of unequal length by which a liquid can be transferred from a reservoir and then down to a lower level of it. Siphon will fail to work if, the level of the liquid in the two vessels are at the same height.
[#1084] Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
Correct Answer
(C) Both the heating effect of current and hysteresis loss
Explanation
Solution: Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to both the heating effect of current and hysteresis loss.
[#1085] Light year is a unit of
Correct Answer
(B) Distance
Explanation
Solution: Light year is a unit of distance.