For fission to occur, neutrons must posses

Which one of the following material has smaller half life?

When a nucleus emits an alpha particle, its atomic mass decreases by (D.G.Khan 2015 Group II)

The mass of β particle is euqal to the mass of: (FSD 2016)

Fusion chain reaction is controlled by: (MTN 2016 GI)

Mass spectrograph can he used to

Fission chain reaction is controlled by introducing

Radioactive traces are also employed to follow the path that various chemicals or food constituents taken in

0.1 Kg is equivivalent to the energy of (D.G.Khan 2015 Group II)

To start a fusion reaction, the temperature required is about

The mass of the nucleus is always less than the total mass of the protons and-neutrons that make up the nucleus. The difference of the two masses is called

Nuclear forces are

A solid state detecter mainly consists of a

Various types of cancer are treated by

Mass of the proton is of the order of

The diameter (size) of an atom is of the order of

Neutron was discovered in

The energy needed to create an electron-hole pair in a solid state detecter is

Mass of neutron is of the order of

The units of decay constant is (D.G.Khan 2016 G I)

Charge on electron is:

The diameter (size) of the nucleus is of the order of

The γ-rays radiographs are used in

Which one of the following can produce little ionization?

Both Xenon and cesium each have isotopes

Cancerous tissues in a thyroid gland can be detected by the intake of

If half life of a radioactive element is one year, percentage of sample decays after two years is

Product of half life(T_1/2) and decay constant(λ) of a radioactive element is

Which of the following is the approximate density of nuclear matter (nucleus)

Relation for half life of any radioactive element is (SGD 2016 GI)

The number of neutrons in Li are (D.G.Khan 2016 G I)

Nuclear forces are mediated by

1 a.m.u. is equal to (SWL 2016)

For atomic nuclei, the binding energy per nucleon

S^-1 is not the unit of

Complete the euqation for following fission process: ₉₂U²³⁵ + _°ree;n¹ → ₃₈Sr⁹⁰

The distance traveled by α-particle in a medium before coming to rest, is called

The chemical chavior of an atom is determined by

Half life of radon gas is (D.G.Khan 2015 Group I)

Quenching of discharge means making the gas

Mass spectrograph is used to determine

The number of isotopes of caesium aer: (LHR 2015 Group II)

The thin wire at the centre of G.M. tube act as

With one up quark and two down quarks, which of the following can be made?

The range of particle depends upon the factor

The process by which a heavy nucleus splits into two lighter nuclei is called

Radioactivity was discovered in

A pair of quark and anti-quark make a

The potenetial difference between anode and cathode in a neon-bromine filled G.M. counter is

Isotopes of the nucleus of hydrogen are

Thyroid cancer is cured by

Nucelar fuission chain reaction is controlled by using: (MTN 2016 G II )

Neon gas have three isotopes whose atomic number are

The process of nuclear fission was explained by

If M is mass of nucleeus and A I s the mass number then M-A/M is called its

The phenomenon of neutral radioactivity was discovered by

The sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is

The number of type of quarks are: (FSD 2016)

Which of the following is used as a moderator in nuclear reactor?

The cosmic radiations consists of

γ-rays are

The number of Neutrons in ²³⁸₉₂U is: (MTN 2016 GI)

Mass of proton is

Charge on proton is

Pair production take place when energy of γ-rays photon is:

In a nuclear reaction ₂X^A +₂He⁴ → _z+2Y^A+3 + W what praticle does w denote?

The half life of radioactive depend upon

A detector which can count fast and operate at low voltage is

One gray(Gy) is equal to (Mirpur 2015)

Which one of the following belongs to hadrons group?

In which radioactive disintegration neutron dissociates into proton and electron?

Which one of the following rays can pass through 20 cm thickness of steel?

Energy needed to produce an electron-hole pair in solid state dectecter is (D.G.Khan 2015 Group II)

Speed of β particles is nearly equal to (SGD 2016 GI)

Dead time of G.M counter is (D.G.Khan 2016 G I)

Cosmic rays consists of

Mass number is the combined number of

It is possible to understand nuclear fission on the basis of the

How much times, the α-particle more massive than an electron?

Electron was discovered in 1891 by

One joule of energy absorbed per kilogram of body is

Coloured television sets and microwave ovens emit

Mass of neutron is

Which one of the following leptons group?

Solid state detecter with amplifier can be used to detect

The central part of an atom is called

The number of isotopes of helium are

The radio active process is

The tumors are traced by using

In a nuclear reactor using ₉₂U²³⁵ as fuel, the power output is 4.8MW. Which of the following is the number of fission per second? (enrgy released in one fission of ₉₂U²³⁵ = 200 MeV)

1u = __________

Subatomic particles are divided into groups: (BWP 2016)

The chemical properties of an element depends upon the number of

1 Kg mass will be equivalent to Energy (SGD 2016 GII)

In radioactive decay, the original element which disintegrates to another element is called

Quarks carry

Which particle has large range in air: (LHR 2015 Group I)

The types of quarks are

The most abundant isotope of neon is

The main interaction of radiation with matter is

Leptons are

Unit of radio activity is curie which is equal to: (D.G.Khan 2016 G I)

The binding energy per nucleon is

Thermal neutrons can cause fission in

The penetrating power of β-particle is:

The most useful tracer isotope for the treatment of Thyroid gland is: (MTN 2016 G II )

Strength of radiation source is measured in

Proton was discovered by

Radioactive iodine-131 is used to combat cancer of the

Proton was discovered in

Atomic bomb depends upon the process of

The most important and the vital part of a reactor is

The gamma camera is desgined to detect

If the half life of a radioactive substance is T, then its decay constant λ is given by

G.M. counter uses

The missing mass which is converted to energy in the formation of nucleus is called

In Karachi Nuclear power plant(KANUP)__________ is used as moderator

Radioactive ______ gas enters building from ground

Thyroid cancer is cured by (SGD 2016 GII)

The solid state detectors is a p-n junction which operates at the

Solid state detecter is

In G.M. counter The electrons take time to reach the anode

The average amount of energy produced during fission process of ^{235₉₂U is about}

G.M. counter is not suitable for

The branch of Physics which deals with the study of atomic nucleus and sub-atomic particles is called

The most useful tracer is

Which of the following particle has the greatest relative biological?

If A= 235 and Z= 92, then number of neutrons in the nucleus is

Two up quarks and one down quark mates a (SGD 2016 GII)

With two up quarks and one down quark, which of the following can be made?

Thyroid cancer is cured by (SWL 2016)

Nuclear fusion is the source of energy in

Neutron was discovered by

Radiotherapy is often used in the treatment of cancer with:

In nuclear reaction, there is conseration of

Which of the following particle is unstable out side the atom?

In a mass spectrograph, the mass of each ion reaching the detector is proportional to

In GM-counter the quenching gas must have an ionization potential ______ that of principle gas

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

α β and γ rays emitted by a radioactive substance are passed through a region at right angle to their path. The energy gained will be

Fraction of the decaying atoms per unit time is called

Which of the following particles can be added to the nucleus of ______________________ an atom without changin its chemical properties

Complelete the equation for the following fission reaction
²³⁵₉₂U + ¹₀n → ¹⁴⁰₅₄Xe+_______+energy

At least three quarks are necessary to form a

Three quarks take a

The amount of energy required to break the nucleus is called the

In G.M. counter. The positive ions take time to reach the cathode

When nitrogen is bombarded by Alpha Particle, Nitrogen nucleus change into: (BWP 2016)

What %age of mass of atom is concentrated in the nucleus?

The range of Β-particles in air is greater than that of α-particles by:

A neutron decays into a proton, an electron and _______?

The building blocks of protons and neutrons are called

The safe limit dose for persons working in a nuclear facilities or mines is normally considered

The quantity called absorbed radiation dose 'D' is defined as

If N_°ree; is the original number of atoms of radioactive element, then the number of undecayed atoms after two half lives is

Two down and one up quarks marke: (LHR 2015 Group I)

Film badge dosimeter are used to monitor radiation in:

The SI unit of radiation dose is

The SI unit of decay constant is