A nuclear reactor is said to have become 'critical' when

A. it stops due to malfunctioning

B. it starts emitting dangerous radioactive radiations

C. it is shut down to avoid explosion

D. it is ready to produce controlled energy

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Holography is the technique of
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  3. The hygrometer is an apparatus used for finding the
  4. Frictional force acts in
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  6. A cyclist leans inwards when he is negotiating a curve 10 that
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  14. A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks…
  15. When a satellite la In a geostationary orbit the force keeping it in orbit Is
  16. When an electric bulb breaks, there la an explosive sound. That is due to
  17. When light travels from one medium to another there is a change in its
  18. A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left…
  19. The hydraulic jack to lift heavy vehicles in automobile service stations is one of the applications…
  20. If an empty cylinder Is half ruled with a liquid, Its centre of gravity is
  21. Raindrops assume a spherical shape because or
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  24. The ballistic missile, Agni 11, tested by India has a maximum range of
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  28. An ammeter has
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