ENTRANCE TEST – 2011 Multiple Questions and Answers.




26.Half-life of a radioactive element is:
A. Inversely proportional to square of decay constant
B. Directly proportional to square of decay constant
C. Directly proportional to decay constant
D. Inversely proportional to decay constant

27.The transformation of a neutron into proton in the nucleus gives rise to emission of:
A. Beta particles
B. Alpha particles
C. Gamma particles
D. X-rays

28.The ratio of the rate of decay of a parent atom to the number of radioactive nuclei present at that time is equal to:
A. Half-life of radioactive element
B. Mean life
C. Decay constant of radioactive element
D. Activity if radioactive element

29.Which one of the following particle is emitted as a result of nuclear reaction?
A. Beta
B. Alpha
C. Gamma rays
D. One alpha and one beta

30.Which of following is used to estimate the circulation of blood in a patient?
A. Carbon-14
B. Carbon-12
C. Phosphorus-32
D. Sodium-24

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