Physics MCQs

Page No. 39

An alpha particle is emitted from 88Ra226. What is the mass and atomic number of the daughter nucleus ?


a224 – 84

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b220 – 80

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c222 – 86

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d226 – 87

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View Answer 222 – 86

Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________?


a Smaller

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bGreater than 82

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cSame

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dSometimes smaller some times greater

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View Answer Greater than 82

A mass spectrograph (spectrometer) sorts out____________?


aMolecules

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bIons

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cElements

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dIsotopes

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View Answer Elements

Nuclei having the same mass number but different atomic number are____________?


a Isotopes

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bIsobars

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c Isotones

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dIsomers

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View Answer Isobars

Mass of neutron is________________?


a 1.67 x 10-31 kg

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b1.67 x 10-27 kg

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c 9.1 x 10-31 kg

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d1.67 x 10-19 kg

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View Answer 1.67 x 10-27 kg

A particle having the mass of an electron and the charge of a proton is called a______________?


aAntiproton

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bPositron

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cGamma rays

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dPhoton

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View Answer Positron

The charge on neutron is_______________?


a Plus 1.6 x 10-19C

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bZero

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cMinus 1.6 x 10-19C

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dNo definite charge

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View Answer Zero

The charge on an electron was determine by ________________?


aAmpere

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bMaxwell

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cMillikan

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dThomson

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View Answer Millikan

Which one of the following radiations possesses maximum velocity ?


a α-rays

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b β-rays

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c γ-rays

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dAll of above have the same speed

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View Answer γ-rays

The fission chain reaction in a nuclear reactor can be controlled by introducing _______________?


a Iron rods

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bGraphite rods

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cCadmium rods

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dPlatinum rods

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View Answer Cadmium rods

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