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2000 · Q100Science & TechnologyPhysicseasy

Fluorescent tubes are fitted with a choke. The choke coils

  1. (a)step up the line voltage
  2. (b)step down the line voltage
  3. (c)reduce current in the circuit
  4. (d)choke low-frequency currents
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Official answer(c) reduce current in the circuit

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