AIPMT 2008 | Atoms and Nuclei Question 83 | Physics

AIPMT 2008

MCQ (Single Correct Answer)

-1

Out of Syllabus

Two radioactive materials X₁ and X₂ have decay constants $$5\lambda $$ and $$\lambda $$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X₁ to that X₂ will be 1/e after a time

1/4$$\lambda $$

e/$$\lambda $$

$$\lambda $$

$${1 \over 2}\lambda $$

AIPMT 2008

MCQ (Single Correct Answer)

-1

Out of Syllabus

Two nuclei have their mass numbers in the ratio of 1 : 3. The ratio of their nuclear densities would be

$${\left( 3 \right)^{1/3}}:1$$

1 : 1

1 : 3

3 : 1

AIPMT 2007

MCQ (Single Correct Answer)

-1

A nucleus $${}_Z^AX$$ has mass represented by M(A, Z). If M_p and M_n denote the mass of proton and neutron respectively and B.E. the binding energy in MeV, then

B.E. = [ZM_p + (A $$-$$ Z)M_n $$-$$ M(A, Z)]c²

B.E. = [ZM_p + AM_p $$-$$ M(A, Z)]c²

B.E. = M(A, Z) $$-$$ ZM_p $$-$$ (A $$-$$ Z)M_n

B.E. = [M(A, Z) $$-$$ ZM_p $$-$$ (A $$-$$ Z)M_n]c²

AIPMT 2007

MCQ (Single Correct Answer)

-1

Out of Syllabus

In a radioactive decay process, the negatively charged emitted $$\beta $$-particles are

the electrons produced as a result of the decay of neutrons inside the nucleus

the electrons produced as a result of collisions between atoms

the electrons orbitting around the nucleus

the electrons present inside the nucleus

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