(A) 200Gy
(B) 50 Gy
(C) 102 Gy
(D) 98 Gy
Category: Physics Mcqs
Physics Mcqs for NTS, PPSC, FPSC, CSS, PMS, Educators, SPSC, Lecturer, BPSC, AJKPSC, PTS, PST, EST, SST and all other exams. Users will find mcqs related to mechanics, Thermodynamics, Photonics, study of heat, Distance, work, force, time, machines, study of electricity, magnetism, law of motion, nuclear physics, Quantum, relativity, solar system, and all the topics will be covered in the physics mcqs section.
Sodium-24 has half-life of 15 hours and it is used in medicine estimate:
(A) Kidney function
(B) Plasma blood volume
(C) Iron in plasma
(D) Thyroid function
The decay of a radioactive nuclide is represented by the equation dN =-λN dt where (λ = 2.4×10 s . The half-life of the nuclide will be):
(A) 2.9 x 10 power7 s
(B) 3.4 x 10 power-8s
(C) 1.3 x 10 power 7s
(D) 8 x 10 power-8s
What percentage of the parent isotope remains after 0.5 half-lives have passed?
(A) 70.7%
(B) 100%
(C) 50%
(D) 0.5%
The half-life of a radioactive element is such that 7 8 of a quantity of it decays in 12 days what fraction of it remain undecayed after 24 day?
(A) 0
(B) 1/128
(C) 1/64
(D) 1/32
It is a general principle for all radioactive element that whatever may be their half-life, their full life will be:
(A) Finite
(B) Infinite
(C) Constant
(D) None of these
With reference to the interaction of electrons (cathode) with atoms of the anode, what percentage of typically heat occurs:
(A) 1%
(B) 10%
(C) 0.1%
(D) 99%
λ × T1/2:
(A) 0.963
(B) loge1/2
(C) loge2
(D) A and C