ENTRANCE TEST – 2015 Multiple Questions and Answers.




6.A certain radioactive nuclide of mass number ‘x’ decays by β-emission and α-emission to a second nuclide of mass number ‘t’. Which of following correctly relates ‘x’ and ‘t’?
A. x = t + 4
B. x = t - 4
C. x – 3 = t
D. x – 1 = t

7.Cobalt 60 is used in medicine and is an intense source of:
A. α-particles
B. β-particles
C. γ-rays
D. Neutrons

8.In fluid flow, for the equation of continuity A1v1 = A2v2. If velocity of the fluid at one end is doubled, then what will be the cross-sectional area at this end?
A. Double
B. Half
C. (Half)2
D. (Double)2

9.The value of least distance vision for normal eye is
A. 20 cm
B. 30 cm
C. 25 cm
D. 40 cm

10.The distance between two dark adjacent fringes is mathematically written as:
A. ΔY = λL /d
B. ΔY = λ/ dL
C. ΔY = λd/ L
D. ΔY = d /λL

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