In the reaction , if the binding energies of
are respectively, a, b and c (in MeV), then the energy (in MeV) released in this reaction is [2005]
In any fission process, the ratio [2005]
Fission of nuclei is possible because thebinding energy per nucleon in them [2005]
The binding energy of deuteron is 2.2 MeV and that of is 28 MeV. If two deuterons are fused to form one
then the energy released is [2006]
A nucleus AZX has mass represented by M (A, Z). If Mp and Mn denote the mass of proton and neutron respectively and B.E. the binding energy in MeV, then [2007]
If the nucleus has nuclear radius of about 3.6 fm, then
would have its radius approximately as [2007]
If M (A; Z), Mp and Mn denote the masses of the nucleus proton and neutron respectively in units of u ( 1u = 931.5 MeV/c2) and BE represents its bonding energy in MeV, then [2008]
Two nuclei have their mass numbers in the ratioof 1 : 3. The ratio of their nuclear densities wouldbe [2008]
The mass of a nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of
nucleus is nearly
The activity of a radioactive sample is measured as N0 counts per minute at t = 0 and N0/e counts per minute at t = 5 minutes. The time (in minutes) at which the activity reduces to half its value is [2010]
The binding energy per nucleon in deuteriumand helium nuclei are 1.1 MeV and 7.0 MeV,respectively. When two deuterium nuclei fuseto form a helium nucleus the energy released inthe fusion is :
The power obtained in a reactor using U235 disintegration is 1000 kW. The mass decay of U235 per hour is [2011]
A radioactive nucleus of mass M emits a photonof frequency μ and the nucleus recoils. The recoilenergy will be [2011]
Fusion reaction takes place at high temperaturebecause [2011]
Two radioactive nuclei P and Q, in a given sample decay into a stable nucleolus R. At time t = 0, number of P species are 4 N0 and that of Q are N0. Half-life of P (for conversion to R) is 1 minute where as that of Q is 2 minutes. Initially there are no nuclei of R present in the sample. When number of nuclei of P and Q are equal, the number of nuclei of R present in the sample would be [2011M]
If the nuclear radius of 27Al is 3.6 Fermi, the approximate nuclear radius of 64Cu in Fermi is : [2012]
A mixture consists of two radioactive materials A1 and A2 with half lives of 20 s and 10 srespectively. Initially the mixture has 40 g of A1 and 160 g of A2. The amount of the two in themixture will become equal after : [2012]
The half life of a radioactive nucleus is 50 days. The time interval (t2 – t1) between the time t2 when 2/3 of its has decayed and the time t1 when 1/3 of it had decayed is : [2012]
A certain mass of Hydrogen is changed to Heliumby the process of fusion. The mass defect infusion reaction is 0.02866 a.m.u. The energyliberated per a.m.u. is(Given : 1 a.m.u = 931 MeV) [NEET 2013]
How does the binding energy per nucleon varywith the increase in the number of nucleons ? [NEET Kar. 2013]
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