ENTRANCE TEST – 2010 Multiple Questions and Answers.




21.In the half-life of an element, the equation for the number of decaying atoms is given by
A. ΔN ∝ -NΔt
B. ΔN = KNΔt
C. ΔN ∝ -nΔt
D. ΔN = -ΔNΔt

22.Decay constant ‘λ’ is given as
A. - ∆N/N ∆t
B. - ∆N /∆t
C. - N/ ∆t
D. ∆N/N ∆t

23.The SI unit of absorbed dose ‘D’ i.e. radiation effect is Gray and one Gray is equal to
A. kJ / mol
B. J / mol
C. kg / J
D. J / kg

24.The principle of homogeneity of dimensions determines
A. Only variable in the equation
B. Only constant in the equation
C. Correctness of an equation
D. Constant and variable in the equation

25.For a body to be in complete equilibrium
A. Linear acceleration is zero
B. Angular acceleration is zero
C. Linear acceleration is zero but angular acceleration is not zero
D. Linear acceleration and angular acceleration both should be zero

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