SawaalBoxसवाल बॉक्स
1996 · Q121Science & TechnologyPhysicsmoderate

Assertion (A): Transformer is useful for stepping up or stepping down voltages. Reason (R): Transformer is a device used in D.C. circuits. In the context of the above two statements, which one of the following is correct?

  1. (a)Both A and R are true and R is the correct explanation of A.
  2. (b)Both A and R are true but R is not a correct explanation of A.
  3. (c)A is true but R is false.
  4. (d)A is false but R is true.
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Official answer(c) A is true but R is false.

2015 · Q30Science & TechnologyPhysicsmoderate

In the context of modern scientific research, consider the following statements about ‘IceCube’, a particle detector located at South Pole, which was recently in the news : 1. It is the world’s largest neutrino detector, encompassing a cubic kilometre of ice. 2. It is a powerful telescope to search for dark matter. 3. It is buried deep in the ice. Which of the statements given above is/are correct?

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(d) 1, 2 and 3