AIPMT 2003 | Atoms and Nuclei Question 95 | Physics

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

AIPMT 2003

MCQ (Single Correct Answer)

-1

The volume occupied by an atom is greater than the volume of the nucleus by a factor of about

10¹

10⁵

10¹⁰

10¹⁵

AIPMT 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

A sample of radioactive element has a mass of 10 g at an instant t = 0. The approximate mass of this element in the sample after two mean lives is

1.35 g

2.50 g

3.70 g

6.30 g

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