Question # 1

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

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Neutrons

Electrons

Positrons

Mesoris

Gamma radiations are emitted due to:

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De-excitation of atom

De-excitation of nucleus

Excitation of atom

Excitation of nucleus

Which of the following is typical source of alpha particle.

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Strontium -94

Radon -222

Cobalt -60

Zic sulphate

The energy equivalent of 1 kg of matter is about:

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10^-15 J

1 J

10^-12J

10^-17J

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

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

The place for soring the nuclear waste is

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Ocean

Damping in earth

Damping in desert

Bottom of old salt mines

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

Curie is unit of.

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Conductivity

Binding energy

Radioactivity

Resistivity

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

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

Subatomic particles are divided into groups.

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Photon

Laptons

Hadrons

All of these

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

Which particle has larger range in air.

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Alpha rays

Gama rays

Beta rays

Neutron

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

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

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