AIPMT 2003 | Atoms and Nuclei Question 107 | Physics

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AIPMT 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

A nuclear reaction given by

_ZX^A $$ \to $$ _z+1Y^A + _$$-$$1e⁰ + $$\overline v $$ represents

$$\beta $$-decay

$$\gamma $$-decay

fusion

fission

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

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

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

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