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Free Online Mock Physics Multiple Choice Test on Atomic Nuclearphysics
Sub Category : Atomic Nuclearphysics Test : 2 Time Left :
1) The half-life of radium is 1600 years. A fraction 1/16 of the sample will remain after (1) 1600 years (2) 3200 years (3) 6400 years (4) 800 years
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2) Charge on α-particle is (1) 1.6 Ã- 10-19 C (2) 1.6 Ã- 10-20 C (3) 3.2 Ã- 10-19 C (4) 3.2 Ã- 10-20 C
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3)A radioactive sample has half-life of 5 years. Probability of decay in 10 years will be
(1) 25% (2) 50% (3) 75% (4) 100%
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4) Energy of electron is an orbit of H-atom is
(1) Positive (2) Zero (3) Negative (4) Unity
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5)The concept of stationary orbits was proposed by
(1) J.J. Thomson (2) Rutherford (3) Neil Bohr (4) I. Newton
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