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Atoms & Nuclear Physics Mock Tests

14 questions available

Atoms & Nuclear Physics Mock Test 1

Questions: 14

नमूना प्रश्न

CUET Physics
The mass defect of a nucleus is defined as:
A the difference between the sum of masses of individual nucleons and the actual mass of the nucleus
B the sum of masses of protons only
C the difference between mass of protons and neutrons
D the total mass of the nucleus
CUET Physics
The density of nuclear matter is:
A directly proportional to mass number A
B inversely proportional to mass number A
C independent of mass number A
D proportional to A²
CUET Physics
Among the four fundamental forces of nature, the strongest is:
A gravitational force
B electromagnetic force
C weak nuclear force
D strong nuclear force
CUET Physics
When a nucleus emits an alpha particle, its atomic number Z and mass number A change by:
A ΔZ = −1, ΔA = −1
B ΔZ = −2, ΔA = −4
C ΔZ = −2, ΔA = −2
D ΔZ = −1, ΔA = −4
CUET Physics
The binding energy per nucleon is maximum for which nucleus?
A U-235
B Fe-56
C He-4
D H-1
CUET Physics
The decay constant λ of a radioactive substance is related to its half-life t₁/₂ by:
A λ = t₁/₂/ln 2
B λ = ln 2/t₁/₂
C λ = 2/t₁/₂
D λ = t₁/₂/2
CUET Physics
According to Bohr's model of hydrogen atom, the angular momentum of an electron in the nth orbit is:
A
B nħ/2
C 2nħ
D n²ħ
CUET Physics
A radioactive substance has a half-life of 5 days. After 20 days, the fraction of the original amount remaining is:
A 1/8
B 1/16
C 1/4
D 1/32

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