Previous year MCQs

General science UPPSC 2000 GS-I
Question

At which temperature superconductivity can be of tremendous economic interest saving billions of rupees?

Answer & Solution

Answer: (Detailed Solution Below)

Option C: At room temperature

Detailed Solution:

The correct answer is “At room temperature”.
The answer is: (3) At room temperature.

As of now, superconductivity can be achieved only at very low temperatures, more than 250 degree Celsius below zero, very close to absolute zero which is – 273 degree Celsius.

If semiconductors could become superconductors at higher, more accessible temperatures, it could lead to significant energy savings and economic benefits in various applications.

Absolute zero is the lowest temperature possible, at which a thermodynamic system has the lowest energy and there is no motion or heat: 0 kelvin, or -273.15°C, or -459.67°F.

Similar Questions:

Match list-I with list-II and select the correct answer using the code given below the lists:
List-I (molecules) - List-II (elements present)

A. Vitamin B12 - 1. Magnesium
B. Haemoglobin - 2. Cobalt
C. Chlorophyll - 3. Copper
D. Brass - 4. Iron

Code:
A B C D
  1. A) 2 4 1 3
  2. B) 2 1 3 4
  3. C) 4 1 2 3
  4. D) 3 4 2 1
In which of the following types of heat engines carburettor is used ?
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  2. B) Steam engine
  3. C) Petrol engine
  4. D) Diesel engine
Change in the base sequence within the germ is called:
  1. A) breeding
  2. B) mutation
  3. C) cloning
  4. D) fusion
Which one of the following is not a natural polymer:
  1. A) wool
  2. B) silk
  3. C) leather
  4. D) nylon
Super rice was developed by:
  1. A) M.S. Swaminathan
  2. B) G.S. Khush
  3. C) N.E. Borlaug
  4. D) P.K. Gupta
In an earthen pitcher, the water remains cold due to the process of
  1. A) condensation
  2. B) evaporation
  3. C) sublimation
  4. D) none of the above
Which one of the following human organs is less susceptible to harmful radiations?
  1. A) Eyes
  2. B) Heart
  3. C) Brain
  4. D) Lungs
Which of the following paris is NOT correctly matched?
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  2. B) Genetic Engineering-Plasmids
  3. C) Golden rice-Vitamin A
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There is no reservation for SC and ST for Lok Sabha in:
  1. A) Arunachal Pradesh
  2. B) Jammu & Kashmir
  3. C) Meghalaya
  4. D) All the above
2, 4-D is:
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  2. B) an explosive
  3. C) a fungicide
  4. D) a herbicide
'Dynamo' is a device, which converts:
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  2. B) electrical energy into mechanical energy
  3. C) mechanical energy into electrical energy
  4. D) electrical energy into chemical energy
For human blood transfusion, which blood group is known as universal donor?
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  2. B) O Group
  3. C) AB Group
  4. D) A+ Group