PPSC Lecturer of Physics Online Test 31 Past Papers

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Online Free Taleem is free online MCQ’s test related to Lecturer Physics. All the individuals who are going to appear in Lecturer Physics written test can attempt these tests in order to prepare for it in best possible way. Our tests of Lecturer of Physics include all the important questions and Past Paper of  Lecturer Physics, that have extremely high amount of chances for been included in the actual exam which make our test undoubtedly the best source of preparation.

Note:-

There will be 25 multiple choice question in the test.
Answer of the questions will change randomly each time you start this test.
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Test Instructions:-
Test Name Lecturer Physics 
Subject Physics Test 31
Test Type MCQs
Total Questions 25
Total Time 20 Minutes
Total Marks 100
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You have 20 minutes to pass to the quiz.

PPSC Lecturer of Physics Test 31

1 / 25

A large collection of nuclei are undergoing alpha decay. The rate of decay at any instant is proportional to:

2 / 25

At the end of 14 min, 1/16 of a sample of radioactive polonium remains. The corresponding half-life is:

3 / 25

In addition to the daughter nucleus and an electron or positron, the products of a beta decay include:

4 / 25

Starting with a sample of pure 66Cu, 7/8 of it decays into Zn in 15 minutes. The corresponding half-life is:

5 / 25

Radioactive 90Sr has a half-life of 30 years. What percent of a sample of 90Sr will remain after 60 years?

6 / 25

The half-life of a radioactive isotope is 140 days. In how many days does the decay rate of a sample of this isotope decrease to one-fourth of its initial decay rate?

7 / 25

The half-life of a given nuclear disintegration A → B:

8 / 25

The relation between the disintegration constant λ and the half-life T of a radioactive substance is:

9 / 25

The half-life of a radioactive substance is:

10 / 25

Some alpha emitters have longer half-lives than others because:

11 / 25

A nucleus with mass number A and atomic number Z emits an alpha particle. The mass number and atomic number, respectively, of the daughter nucleus are:

12 / 25

In an alpha decay the disintegration energy appears chiefly as:

13 / 25

A radium atom, 226Ra (Z = 86) emits an alpha particle. The number of protons in the resulting atom is:

14 / 25

A nucleus with mass number A and atomic number Z undergoes β − decay. The mass number and atomic number, respectively, of the daughter nucleus are:

15 / 25

Beta particles from various radioactive sources all have:

16 / 25

The half-life of radium is about 1600 years. If a rock initially contains 1 g of radium, the amount left after 6400 years will be about:

17 / 25

The energies of electrons emitted in β− decays have a continuous spectrum because:

18 / 25

A radioactive atom X emits a β− particle. The resulting atom:

19 / 25

A nucleus with mass number A and atomic number Z undergoes β+ decay. The mass number and atomic number, respectively, of the daughter nucleus are:

20 / 25

Of the three common types of radiation (alpha, beta, gamma) from radioactive sources, electric charge is carried by:

21 / 25

Stable nuclei generally:

22 / 25

210Bi (an isotope of bismuth) has a half-life of 5.0 days. The time for three-quarters of a sample of 210Bi to decay is:

23 / 25

An alpha particle is:

24 / 25

65Cu can be turned into 66Cu, with no accompanying product except a gamma, if bombarded with:

25 / 25

The greatest binding energy per nucleon occurs for nuclides with masses near that of:

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