PPSC Physics Topic 7 MCQ Test With Answer

Prepare Modern Physics and all other important topics with PPSC Physics online test. Modern Physics is a term that is used to describe all the discoveries and observations that made physicists rethink their understanding of Physics in the 19th and 20th centuries. In this day and age, one can't study Physics without having a firm understanding of concepts of Modern Physics. That’s why seekers for PPSC Physics jobs need to understand the subject of Modern Physics. Examiners ask many questions from this topic in the PPSC Physics test.

To make the PPSC exam preparation easier for you, team IlmKiDunya.com has created the PPSC Physics online test portal. On this page, you can attempt the PPSC online test MCQs about Modern Physics. Many students complain that they don’t find information about the PPSC Physics exam preparation. We at IlmKiDunya.com bring PPSC online test to your fingertips so you can prepare quickly for the test.

MCQ's Test For PPSC Physics Topic 7 Modern Physics

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PPSC Physics Topic 7 Modern Physics

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Question # 1

The unit generally used for measuring astronomical distances is.

Question # 2

The particles less in mass than protons are

Question # 3

A newly prepared radioactive nuclide has a decay constant Lamda of 10-6 s-1 What is the approximate half life of the nuclide.

Question # 4

The number of electrons in U nucleus are.

Question # 5

Which of the following are electromagnetic waves.

Question # 6

A gama ray of energy 1900 MeV is absorbed by

Question # 7

Which type of amplifier causes minimum drain of power supply.

Question # 8

A spectroscope sorts out

Question # 9

The maximum K.E of photo electrons depends upon

Question # 10

For the normal operation of transistor the emitter base junction is always.

Question # 11

The SI unit of decay constant is.

Question # 12

As the mass number varies, which of the quantities does not change w.r.t nucleus.

Question # 13

One rem is equal to.

Question # 14

X-rays are also used for

Question # 15

The resistance between(+) and (-) inputs of an amplifier is.

Question # 16

Radius of the Bother's orbit is r the radius of second orbit will be.

Question # 17

An example of continuous spectrum is.

Question # 18

What is the effect of electric and magnetic fields on X-rays

Question # 19

X-rays spectrum may be

Question # 20

X-rays are good for imagining

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Photocells are used for
A. Security systems
B. Counting systems
C. Automatic door system
D. All of the above
2 Tracer techniques make use of.
A. Neutron scattering
B. Electron beams
C. LASER
D. Radioactive isotopes
3 The wavelength of Lyman series for hydrogen spectrum lies in the.
A. Visible region
B. Ultraviolet region
C. Infrared region
D. Far infrared region
4 Which of the following is the most massive particle.
A. Deuteron
B. Alpha particle
C. Neutron
D. positron
5 Which of the following is believed to be carrier o nuclear forces.
A. Lepton
B. Meson
C. Bason
D. Baryon
6 The radius of second orbit of hydrogen atom is
A. 0.071 A
B. 0.142 A
C. 4.752 A
D. 9.5298 A
7 At what speed the mass of a body will be doubled.
A. 0.67 C
B. 0.77 C
C. 0.87 C
D. 0.97 C
8 The total energy of an electron in an orbit around the nucleus is.
A. Zero
B. Unity
C. Infinity
D. Negative
9 Which circuit elements has two stable states and can be used to store information.
A. Flip flop or latch
B. Logic gate
C. Oscillator
D. Amplifier
10 The potential due to which an electron is lifted from gerund state to excited state is.
A. Potential gradient
B. excitation potential
C. Ionization potential
D. Potential difference

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