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QAIPM-2011-Ph-1819: NEET 2011 Physics - Class 12 AIPM-2011-Ph-1819 Solution: A particle of mass M is situated at the centre of a spherical…
A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The magnitude of the gravitational potential at a point situated at a/2 distance from the centre will be:
Multiple Choice Options
- A 2 N 0
- B 3 N 0
- C 2 9 N 0 _ _
- D 2 5 N 0 _ _
Step-by-Step Verified Solution
Initially P = 4N 0
Q = N 0
Half life T P = 1 min.
T Q = 2 min.
Let after time t number of nuclei of P and Q are
equal, that is
N P
= N Q
_ 4 N 0 ( 1 2 ) t / 1 = N 0 ( 1 2 ) t / 2
_ 2 t / 1 = 4.2 t / 2
_ t = 4 min
After 4 minutes, both P and Q have equal number of
nuclei.
_ Number of nuclei of R
= ( 4 N 0 _ N 0 4 ) + ( N 0 _ N 0 4 )
= 9 N 0 2