Question # 1

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

The scientist who suggested the presence of neutron was:

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Bohr

Rutherford

Chadwick

J.J Thomson

In Wilson cloud chamber, if tracks are thick, straight and continuous, then particle is

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a-particles

ß-particles

Y-rays

All

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

The charge of an alpha particle is equal to

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-e

+e

-2e

2e

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

James chadwick discovered:

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Proton

Positron

Neutron

Electron

The number of Isotopes of cesium are.

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4

32

22

36

The building blocks of protons and neutrons are called.

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Ions

Electrons

Positrons

quarks

Electrons are

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Hadrons

Laptons

Quarks

Baryons

The potential difference between the top and bottom of a cloud chamber is of the order of

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290 v

400 v

1 kv

None of above

Rutherford performed on experiment on a nuclear reaction in:

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1921

1981

1927

1932

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

Two down and one up quarks make

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Proton

Neutron

~~photon~~

Positron

The Unit of decay constant.

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Second

(second)-1

m-1

mk

Which one of the following is not affected by electric or magnetic field.

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Beta rays

Gama ryas

Alpha rays

Electron

The particles which do not experience strong force are called.

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Baryons

Hadrons

Mesons

Laptons

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

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