Nuclear Physics Nat Level – 1

# Nuclear Physics Nat Level – 1 - Physics

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## 10 Questions MCQ Test Topic wise Tests for IIT JAM Physics - Nuclear Physics Nat Level – 1

Nuclear Physics Nat Level – 1 for Physics 2023 is part of Topic wise Tests for IIT JAM Physics preparation. The Nuclear Physics Nat Level – 1 questions and answers have been prepared according to the Physics exam syllabus.The Nuclear Physics Nat Level – 1 MCQs are made for Physics 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Nuclear Physics Nat Level – 1 below.
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*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 1

### The half life of a radioactive substance is 3h and its activity is 1µCi. Then the activity after 9h will be (in µCi)

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 1

The correct answer is: 0.125

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 2

### An electron positron pair (rest mass of each particle = 0.51 MeV) is produced by a γ -ray photon of energy 2.42 MeV. The K.E. (in MeV) imparted to each of the charged particles shall be :

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 2

Rest mass energy + kinetic energy = energy of gamma photon

The correct answer is: 0.7

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 3

### The probability of a radioactive atoms to survive 5 times longer than its half value period is.

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 3

Decay period = Half life × No. of half lives

The correct answer is: 0.03125

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 4

A radioactive nuclie decay as follows  If mass number and atomic number of A are 180 and 72 respectively then atomic number for A4 will be.

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 4

72A180 -α->70A1176 -β->71A2176 -α->69A3172-γ->69A4174

The correct answer is 69.

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 5

After emission of an α -particle by a radioactive element 84X212, the resulting mass number would be.

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 5

The correct answer is: 208

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 6

If the mass of proton = 1.008 amu and mass of neutron = 1.009 amu then binding energy (in MeV) per nucleon for 4Be9  (mass = 9.012 amu) would be :

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 6

Binding energy

The correct answer is: 6.72

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 7

After a time equal to four half lives, the percentage of radioactive material remaining undecayed is :

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 7

The correct answer is: 6.25

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 8

The half-life of cobalt 60 is 5.25 years. How long after a new sample is delivered, will the activity have decreased to about one third (1/3) of its original value. (Provide the time in years).

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 8

The correct answer is: 8.3

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 9

The mean life of a radioactive sample is 100 years. Then after 100 years, what percentage of the sample remains active.

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 9

The correct answer is: 37

*Answer can only contain numeric values
Nuclear Physics Nat Level – 1 - Question 10

1014 fissions per second are taking place in a nuclear reactor having efficiency 40%. The energy released per fission is 250 MeV. The power output (in Watts) of the reactor is :

Detailed Solution for Nuclear Physics Nat Level – 1 - Question 10

Power output 0.4 x power input = 0.4 x 250 x 106 x 1.6 x 10-19 x 1014 = 1600W.

The correct answer is: 1600

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