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A factory buys 100 kg of a radioactive chemical with a half-life of 5 years which decays to a stable compound. How much of the chemical will still be radioactive in 10 years time.
NUMS 2017
Physics
Nuclear Physics
Elimination Tool:
Radiation cause damage in a)
If half-life of an element Is 4 minutes, then 3/4′ of It Is decayed in:
An element whose atomic number is same but mass number is different is called:
NUMS 2019 Reconduct
Physics
Nuclear Physics
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_______ is also known as anti-electron.
NTS 2017
Physics
Nuclear Physics
Elimination Tool:
Which of the following affects our eye?
Half-life of iodine-131 is 8 days. If 20mg is present initially. How much iodine is left behind after 2 half-lives?
NUMS 2020
Physics
Nuclear Physics
Elimination Tool:
Why is the total mass of all individual protons and neutrons in a nucleus greater than the mass of the nucleus which they constitute?
NUMS 2020
Physics
Nuclear Physics
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In which of the following the pn Junction is used?
Meson consists of:
Let X be a radioactive element having No nuclei. The time required to decay this element to one half of its initial number No is known as:
NTS 2018
Physics
Nuclear Physics
Elimination Tool:
An alpha particle is ejected from the nucleus of an atom. Which of the following answers describes the change in the nucleus of the atom?
NUMS 2014
Physics
Nuclear Physics
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Particles which can be added to the nucleus of an atom without changing its chemical properties are:
NUMS 2017
Physics
Nuclear Physics
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Alpha particle has
The binding per nucleon of deuteron (21H) and helium nucleus (42He) are 1.1 MeV and 7 MeV respectively. If two deuterons merge to form a single helium nucleus, the energy released will be:
NUMS 2019 Cancelled
Physics
Nuclear Physics
Elimination Tool:
In heavy nuclei the number of neutrons is than protons
4.5 x 109 years is the half-life of:
NUMS 2020
Physics
Nuclear Physics
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Sodium nucleus consists of 11 protons and 12 neutrons. The conventional symbol of this nucleus is?
NTS 2014
Physics
Nuclear Physics
Elimination Tool:
The process of natural decay of some heavy nuclides is because of the phenomenon:
NTS 2018
Physics
Nuclear Physics
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Muon has charge of?
Charge on an up-quark is:
Which of the following is the pair of isobars?
NUMS 2016
Physics
Nuclear Physics
Elimination Tool:
Alpha rays are nuclear radiations. They are in fact same as _____ nuclei.
NUMS 2018
Physics
Nuclear Physics
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A body of mass of 2kg absorbed 10 J of radioactive radiations. The absorbed dose of radiation in rad is:
NUMS 2015
Physics
Nuclear Physics
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The lightest element which exhibits radioactivity is:
NTS 2017
Physics
Nuclear Physics
Elimination Tool:
What’s relation between penetrating power and Ionization power
During the process of nuclear disintegration, when beta particle emission occurs, atomic no. of the atom changes by _____ and the mass number changes by ______.
NUMS 2018
Physics
Nuclear Physics
Elimination Tool:
Which of the following have low ionization and high penetrating power?
The half-life of C14 is about:
NTS 2012
Physics
Nuclear Physics
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Beta particles are the particles emitted from the _____ of an atom.
NTS 2016 SMBBMC
Physics
Nuclear Physics
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Which gas is not used in GM counter?
Which of the following gives the correct expression of Decay Constant?
Alpha, Beta, and Gamma radiations are emitted from a radioactive substance:
NUMS 2017
Physics
Nuclear Physics
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Human body emits which of the following radiation?
The half-life of Iodine Is
Energy of fast moving neutron Is?
To remove the huge amount of heat energy in a nuclear reactor, ______ is/are used.
NTS 2012
Physics
Nuclear Physics
Elimination Tool:
Which one of these is used in the treatment of Cancer?
Nucleus with an excess of neutrons may decay radioactivity with the emission of:
NTS 2017
Physics
Nuclear Physics
Elimination Tool:
The detection and estimation of an element in a mixture is sometimes nearly impossible, if it is present in very minute traces or if it’s chemical properties are very similar to those of other elements in the mixture. An effective technique is developed for these purposes is known as?
NTS 2014
Physics
Nuclear Physics
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Species of the same element that have the same atomic number “Z” but have different mass number “A” are called ____ of that element.
NUMS 2017
Physics
Nuclear Physics
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Transmutation occurs when rays are given out:
How many neutrons are released during fusion of two deuterons?
The half-life of a radioactive element depends upon:
NUMS 2016
Physics
Nuclear Physics
Elimination Tool:
Penetration power of gamma rays as compared to alpha rays is
When we measure the nuclear masses and compare them with the masses of the constituent nucleus in free states, the mass of the nucleus is always less than the mass of the constituent nucleons. The difference in mass is known as:
NTS 2015 DUHS and JSMU
Physics
Nuclear Physics
Elimination Tool:
Which of the following is the percentage of the original quantity of a radioactive material left after five half–lives approximately.
NUMS 2016
Physics
Nuclear Physics
Elimination Tool:
A nucleus weighs less than Its sum of nucleons, a quantity known as the
A lithium nucleus contains 3 protons and 4 neutrons. What is its atomic number?
NUMS 2017
Physics
Nuclear Physics
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Radioactive elements emit:
NUMS 2017
Physics
Nuclear Physics
Elimination Tool:
In Nuclear Physics the mass defect is referred to _______.
NTS 2019
Physics
Nuclear Physics
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Emission of an alpha particle from a radioactive element.
NUMS 2019 Reconduct
Physics
Nuclear Physics
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During radioactive decay of a nucleus zXA, β emission takes place along with the daughter nucleus. Because of this beta particle emission, the mass number (A) of the parent nucleus:
NTS 2018
Physics
Nuclear Physics
Elimination Tool:
While using radiation therapy, cancerous thyroid is treated with ____ radioisotope:
PMC 2020
Physics
Nuclear Physics
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Which of the following will be absorbed by the paper?
) Which can damage eye?
Radiation can cause:
NTS 2011
Physics
Nuclear Physics
Elimination Tool:
Which of the following is an instrument for monitoring radiations:
NUMS 2016
Physics
Nuclear Physics
Elimination Tool:
In Nuclear reactions, we have the conservation of:
NTS 2017
Physics
Nuclear Physics
Elimination Tool:
Which of the following can cause least Ionization but has high Penetrating Power?
How many quarks neutron and proton is made up of?
Which of the following radiation detector operates under Reverse Bias?
Fusion and fission reactions are associated with:
NTS 2012
Physics
Nuclear Physics
Elimination Tool:
The chemical properties of elements depend on ________.
NUMS 2019 Reconduct
Physics
Nuclear Physics
Elimination Tool:
There are leptons
If u and d represent up quark and down quark respectively then composition of Proton and Neutron can be written as:
NUMS 2019 Cancelled
Physics
Nuclear Physics
Elimination Tool:
Disintegration of a radioactive element is
There are initially 400 atoms in a radioactive sample. What would be the number of atoms after 3 half – life?
PMC 2020
Physics
Nuclear Physics
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Which of the following consist of two quarks? a
What is correct about alpha and x rays?
Which of the following has highest ionizing power and least penetrating power?
Nuclear fission reaction takes place In controlled conditions by the
Gamma rays are emitted from nuclei of radioactive atoms. They are nothing but:
NTS 2016 DUHS & JSMU
Physics
Nuclear Physics
Elimination Tool:
The half-life of C14 is approximately 5,730 years, while the half-life of C12 is essentially infinite. If the ratio of C14 to C12 in a certain sample is 25% less than the normal ratio in nature, how old is the sample?
NTS 2013
Physics
Nuclear Physics
Elimination Tool:
A nucleus consists of 11 protons and 12 neutrons. The conventional symbol of nucleus is:
NTS 2011
Physics
Nuclear Physics
Elimination Tool:
Which of the following has greater speed In space?
Which of the following Is not true about radioactivity?
During the process of nuclear disintegration, when alpha particle emission occurs, atomic no. of the atom changes by _____ and its mass number changes by _____.
NTS 2016 DUHS & JSMU
Physics
Nuclear Physics
Elimination Tool:
A material that does NOT become radioactive after absorbing neutrons is called.
NTS 2019
Physics
Nuclear Physics
Elimination Tool: