PPSC Lecturer of Physics Online Test 34 Past Papers

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.


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 34
Test Type MCQs
Total Questions 25
Total Time 20 Minutes
Total Marks 100

You have 20 minutes to pass to the quiz.

PPSC Lecturer of Physics Test 34

1 / 25

The effective charge acting on a single valence electron outside a closed shell is about Ne, where N is:

2 / 25

Suppose the energy required to ionize an argon atom is i, the energy to excite it is e, and its thermal energy at room temperature is t. In increasing order, these three energies are:

3 / 25

Two different electron beams are incident on two different targets and both produce x rays. The cutoff wavelength for target 1 is shorter than the cutoff wavelength for target 2. We can conclude that:

4 / 25

In a Moseley graph:

5 / 25

Photons in a laser beam have the same energy, wavelength, polarization direction, and phase because:

6 / 25

For any atom other than hydrogen and helium all electrons in the same shell have:

7 / 25

In connection with x-ray emission the symbol Kα refers to:

8 / 25

An electron in an L shell of an atom has the principal quantum number:

9 / 25

In a laser:

10 / 25

Radiation with the minimum wavelength as well as the K x-ray lines are detected for a certain target. The energy of the incident electrons is then doubled, with the result that:

11 / 25

A laser must be pumped to achieve:

12 / 25

The Kα x rays arising from a cobalt (Z = 27) target have a wavelength of about 179pm. The atomic number of a target that gives rise to Kα x rays with a wavelength one-third as great
(≈ 60pm) is:

13 / 25

A photon with the smallest wavelength in the continuous z-ray spectrum is emitted when:

14 / 25

The ratio of the wavelength of the Kα x-ray line for Nb (Z = 41) to that of Ga (Z = 31) is:

15 / 25

The minimum energy principle tells us that:

16 / 25

In connection with x-ray emission the symbol Lβ refers to:

17 / 25

The Pauli exclusion principle is obeyed by:

18 / 25

No state in an atom can be occupied by more than one electron. This is most closely related to:

19 / 25

The most energetic photon in a continuous x-ray spectrum has an energy approximately equal to:

20 / 25

Which of the following subshells cannot exist?

21 / 25

Characteristic K x-radiation of an element occurs when:

22 / 25

In calculating the x-ray energy levels the effective charge of the nucleus is taken to be Z − b, where Z is the atomic number. The parameter b enters because:

23 / 25

The group of atoms at the beginning of periods of the periodic table are called:

24 / 25

The group of atoms at the ends of periods of the periodic table are called:

25 / 25

The ionization energy of an atom in its ground state is:

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