AIPMT 2003 | Atoms and Nuclei Question 107 | Physics

AIPMT 2003

MCQ (Single Correct Answer)

-1

The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $${}_2^4$$ He is
(Given helium nucleus mass $$ \approx $$ 4.0015 u.)

0.0305 J

0.0305 erg

28.4 MeV

0.061 u

AIPMT 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

The mass number of a nucleus is

always less than its atomic number

always more than its atomic number

sometimes equal to its atomic number

sometimes less than and sometimes more than its atomic number

AIPMT 2003

MCQ (Single Correct Answer)

-1

An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb force $$\overrightarrow F $$ between the two is

$$K{{{e^2}} \over {{r^2}}}\widehat r$$

$$ - K{{{e^2}} \over {{r^3}}}\widehat r$$

$$K{{{e^2}} \over {{r^3}}}\widehat r$$

$$ - K{{{e^2}} \over {{r^2}}}\widehat r$$

AIPMT 2003

MCQ (Single Correct Answer)

-1

Solar energy is mainly caused due to

burning of hydrogen in the oxygen

fission of uranium present in the Sun

fusion of protons during synthesis of heavier elements

gravitational contraction

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