Tuesday, August 2, 2011

IMPORTANT 10 MARK QUESTIONS FROM 8’th LESSON.


IMPORTANT  10 MARK    QUESTIONS  FROM  8’th  LESSON.
1.Describe the principle and action of a Bainbridge mass spectrometer in determining the  isotopic masses.
(  JUNE  05,07,08,10,     OCT 06,07,10,     MARCH09 )

2. Explain  the  construction and working  of  a GM (Geiger – Muller )counter.
    (March 07, June 09)

3.What are cosmic rays? Explain (i)Latitude effect (ii)Altitude effect of cosmic rays.  (March 08,10)

4.Obtain an expression for the amount of the radioactive substance present at any moment .  Obtain the relation between half life period and decay constant.(Oct  08 , 09  )

5. What  is nuclear reactor?Explain the function of (i)moderator , (ii) control rods and (iii) neutron reflector. Mention the uses of nuclear reactor.
(March 06)
  




























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