Question # 1

The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass?

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Nucleas A

Nucleus B

Less than nucleus

None of these

The amount of energy equivalent to 1 a.m.u is

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931.5 MeV

93.15 MeV

9.315 MeV

2.224 MeV

When a nucleus emits an alpha particle, its atomic mass decreases by

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1

2

3

4

Materials can be identified by measuring their

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Mass

Half life

Both a and b

None of a,b,c

Both Xenon and cesium have

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33 isotopes

34 Isotopes

36 Isotopes

35 Isotopes

In Wilson cloud chamber, ß-particles leave

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Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

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6 months

8 months

12 months

16 months

The energy equivalent of 1 kg of matter is about:

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10^-15 J

1 J

10^-12J

10^-17J

The number of neutron present in a nucleus in a given by

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N = A+Z

N = A- z

N = Z - A

N = A X Z

If the following particle have the same energy, which particle has the shortest wave length.

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alpha particle

Neutron

Beta particle

Proton

Curie is unit of.

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Conductivity

Binding energy

Radioactivity

Resistivity

The number of protons in any atom are always equal to the number of

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Neutrons

Electrons

Positrons

Mesoris

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

How many times, the alpha particle is more massive than electrons.

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6332

7332

8332

9332

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

A particles equal or greater in mass than of protons are called.

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Baryons

Leptons

Mesons

Quarks

The quantity of U in the naturally occurring uranium is.

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0.2%

0.3%

0.7%

0.4%

Absorbed Dose 'D' is defined as

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m/E

E/C

C/m

E/m

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Physics FSC Part 2 Chapter 21 Online MCQ's Test MCQs With Answers

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