Large astronomical telescopes always use as objective
lens
mirror
combinations of lenses
None of the above
Additional Questions
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One should not connect a number of electrical appliances to the same power socket because |
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Radiocarbon is produced in the atmosphere as a result of |
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It is easier to roll a stone up a sloping road than to lift it vertical upwards because |
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The absorption of ink by blotting paper involves |
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Siphon will fail to work if |
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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 |
Answer |
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Nuclear sizes are expressed in a unit named |
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Metals are good conductors of electricity because |
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Let a thin capillary tube be replaced with another tube of insufficient length then, we find water |
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Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension? |
Answer |