Physics question and answers for October 21, 2023
- Q 29 64 Cu can decay by Bor B emission or electron capture It is known that Cu has a half life of 12 8 hrs with 40 probability of B...
- Q My and My denote the atomic masses of parent and daughter nuclei respectively in a radioactive decay The Q value for B7 decay is Q and that for decay is...
- Q 3 3 7 x 10 Bq 4 3 7 10 Bq The half life of 92U238 undergoing a decay 4 5 x 100 years The activity of 4 g sample...
- Q My and My denote the atomic masses of the parent and the daughter nuclei respectively in a radioactive decay The Q value of decay is Q and that for decay...
- Q 3 The original weight of a certain radioactive substance is 112 grams After 3 hours it decays to 56 grams Find the half life of this substance 4 If the...
- Q Which of the following statements is false Question Type Single Correct Type 1 2 3 4 The energy spectrum of a decay is line spectrum The energy spectrum of particles...
- Q 29 NEET UG 2019 Odisha The rate of radioactive disintegration at an instant for a radioactive sample of half life 2 2 x109 1010 s 1 The number of radioactive...
- Q NEET II 2016 The half life of a radioactive substance is 30 minutes The time in minutes taken between 40 decay and 85 decay of the same radioactive substance is...
- Q 36 A sample of radioactive substance decays simultaneously by two processes A and B with half lives 1 2h and 1 4 h respectively For the first half hour it...
- Q 11 Radioactive nuclei P and Q disintegrate into R with hal lives 1 month and 2 months respectively At time t 0 number of nuclei of each P and Q...
- Q sub A 42 Half life period of a sample is 30 min Its decay 4 fraction at instant t is and decay fraction at 5 9 instant t is then...
- Q 8 A certain substance decays to of its initial 1th 64 activity in 24 days The half life of the substance will be 1 6 days 3 3 days 2...
- Q Figure shows activity A of three different radioactive materials samples Labeled as I II and III verses time Using the given information Choose the correct options A Disintegration constant has...
- Q 3 6 32 mm 4 5 8 mm 7 Half life of a radioactive substance is 20 min The time taken between 20 decay and 80 decay wil be min...
- Q 4 tending to zero 2 12 Two radioactive sources A and B of half lives of 1 hour and 2 hours respectively initially contain the same number of radioactive atoms...
- Q Q 16 If 10 of a radioactive substance decays in every 5 years then the percentage of the substance that will have decayed in 20 years will be 1 40...
- Q 0 A vessel contains a non linear triatomic gas If 50 of gas dissociate into individual atom then find new valu of degree of freedom by ignoring the vibrational mode...
- Q A radioactive isotope of potassium has half life x and decays to a stable isotope of argon in a sample of moon rock If age of moon rock is y...
- Q 34 A graph is plotted between rate of disintegration and number of active nuclei What is half life of the radioactive substance Time in second N 1 3 s 2...
- Q c days the activity of a radioactive sample is 6000 dps The activity reduces to 3000 dpm her 140 days The initial activity of the sample in dps is JEE...
- Q The activity of a sample of a radioisotope at some time is 10 7 mCi and 0 36 h later it is 7 80 mCl Determine the following a Decay...
- Q 30 The mean lives of a radioactive substance are 1620 and 405 years for B emission and B emission respectively The time after which three fourth of a sample will...
- Q A heavy nucleus having mass number 200 gets disintegrated into two small fragments of mass numbers 80 and 120 If binding energy per nucleon for parent atom is 6 5...
- Q SolveLancer Test An element X of atomic number 98 undergoes alpha decays The constant rate of alpha decay is n particles per second Atomic mass number of X is 251...
- Q 20 Two radioactive materials X and X2 have decay constants 5 and 2 respectively If initially they have the same number of nuclei then the ratio of the number of...
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