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AIIMS 2019 Physics Modern Physics Revision Quiz 1
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Question 1
If in a nuclear fusion process, the masses of the fusing nuclei be m1 and m2 and the mass of the resultant nucleus be m3, then.
Question 2
The half-life of radium is about 
years. Of 100g of radium existing now, 25g will remain unchanged after.
years. Of 100g of radium existing now, 25g will remain unchanged after. Question 3
A radio isotope 'X' with a half life 1.4 × 109 years decays to 'Y' which is stable. A sample of the rock from a cave was found to contain 'X' and 'Y' in the ratio 1 : 7. The age of the rock is :
Question 4
Direction: Each of these questions contains two statements. Assertion and Reason Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.
Assertion (A): A particle of mass M at rest decay into two particles of masses 
, having non-zero velocities will have ratio of de-Broglie wavelengths unity.
Reason (R): Here we cannot apply conservation of linear momentum.
, having non-zero velocities will have ratio of de-Broglie wavelengths unity. Reason (R): Here we cannot apply conservation of linear momentum.
Question 5
1 curie is
Question 6
Photon and electron are given same energy (10‑20J). Wavelength associated with photon and electron are λp and λe, the correct statement will be
Question 7
The half life of radioactive elements is 600 yr the fraction of sample that would remain after 3000 yr is
Question 8
Hydrogen atom excites energy level from fundamental state to n =3. Number of spectrum lines according to Bohr is
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May 21NEET & AIIMS
