MDCAT Physics Chapter 12 MCQ Test With Answer for (Atomic spectra)

The students can get the MCQs of Chapter 12 of Physics from this page. The MCQs of all the other chapters are also available that help the students during their preparation phase of MDCAT. The candidates can access the MCQs easily in a hassle-free manner so that they can solve them to strengthen their preparation.

MCQ's Test For MDCAT Physics Chapter 12 Atomic spectra MCQ's Test

Try The MCQ's Test For MDCAT Physics Chapter 12 Atomic spectra MCQ's Test

  • Total Questions20

  • Time Allowed20

Start Test Download PDF

MDCAT Physics Chapter 12 Atomic spectra MCQ's Test

00:00
Question # 1

Which of the following is not true?

Question # 2

The shortest wavelength of X-rays emitted from an X-rays tube depends on the:

Question # 3

Temperature of black body radiating at 270c is increased to 327oc, then emittedenergywill increase by

Question # 4

The momentum of the moving photon is:

Question # 5

Which one is the correct express of de-Broglie equation for the length of atoms of mass m at temp? T(k=Boltzmann’s constant):

Question # 6

Light of frequency 1.5 times the threshold frequency is incident on a photo sensitive material. If the frequency is halved and intensity is doubled the photo electric current becomes

Question # 7

The minimum energy required to remove an electron is called:

Question # 8

In which region of the electromagnetic spectrum does the Lyman series of hydrogen atom lie?

Question # 9

As the intensity of incident light increases:

Question # 10

Of electron of 50 keV strike a heavy target. Then radiation emitted by target will be

Question # 11

Continuous spectrum of X-rays id due to an effect known as

Question # 12

A proton, accelerated through a p.d V has a certain de Broglie wavelength. In order to have the same de Broglie wavelength, an 𝑎 −particles must be accelerated through a potential difference:

Question # 13

Maximum speed of electrons in X-rays tube which is producing X-rays photons of frequency f is

Question # 14

An electron and a proton are accelerated through the same potential. If their masses are me and mp respectively, then the ratio of their de-Broglie wavelength is:

Question # 15

The frequency and work function of an incident photon are n and𝝋𝟎. If f0 is the threshold frequency, then necessary condition for the emission of photo electron is:

Question # 16

Figure represents a graph of kinetic energy (K) of the photoelectrons (in eV) and frequency (v) for a metal used as cathode in photoelectric experiment. The work function of metal is:

Question # 17

Ultraviolet radiation of 6.2 eV falls on an aluminium surface having work function ∅ = 𝟒. 𝟐 𝒆𝑽.
The kinetic energy of the fastest electron emitted is:

Question # 18

The hydrogen atoms are excited to the stationary state designated by the principal quantum number n=4, the number of maximum spectral lines are observe:

Question # 19

When ultraviolet rays are incident in metal plate, then photoelectric effect does not occur. It occurs by the incidence of:

Question # 20

Intensity of light from a point source at the edge of unit sphere will be:

Submit

Prepare Complete Set Wise MDCAT Physics Chapter 12 Atomic spectra MCQ's Test MCQs Online With Answers


Topic Test

00:00
Submit

By practicing the online MCQs, the students have better insight into all the topics included in the chapter. After preparing, the students should spend the maximum time solving the MCQs. It will help the students to ace the exam with a better score. The primary purpose of providing online MCQs is to facilitate the students so they can prepare for the upcoming exam in a better way. Moreover, it is also mandatory for the students to score the maximum marks to get admission to medical and dental colleges. For further updates, keep visiting this platform.

This online test contains MCQs about following topics:.

a) Describe energy of photon E =hf .
b) Understand the concept of photoelectric effect, threshold frequency and work function energy.
c) Explain why the maximum photoelectric energy is independent of intensity where as photoelectric current is proportional to intensity.
d) Describe Einstein’s Photoelectric equation 2 max 2 1 hf = mv .
e) Define and explain de Broglie wavelength and use p h .
f) Understand discrete energy levels of hydrogen atom and spectral lines
g) Use the relation = hf = (E1 -E2 .
h) Describe the production of X-rays and main features of X-rays tube.
i) Identify use of X-rays.
j) Explain Band Theory and its terms valence band, conduction band and forbidden band.

Top Scorers Of MDCAT Physics Chapter 12 Atomic spectra MCQ's Test MCQ`s Test

  • A
    Abdullah Khan 06 - Sep - 2024 02 Min 48 Sec 17/20
  • A
    ayan sajjad 06 - Nov - 2024 02 Min 08 Sec 15/20
  • A
    Azan Awan 17 - Sep - 2024 09 Min 21 Sec 15/20
  • Z
    Zari H 12 - Sep - 2024 18 Min 19 Sec 14/20
  • M
    Mian Bakar 15 - Nov - 2024 04 Min 13 Sec 11/20
  • A
    Aamir Raza 13 - Sep - 2024 09 Min 22 Sec 11/20
  • M
    Mehak Soomro 21 - Sep - 2024 05 Min 56 Sec 10/20
  • Z
    Zainab Haider 14 - Sep - 2024 10 Min 23 Sec 10/20
  • H
    Hina Rani 13 - Nov - 2024 11 Min 49 Sec 10/20
  • I
    ilsa faisal 22 - Sep - 2024 03 Min 16 Sec 9/20
  • A
    Abubakr Islamian 24 - Aug - 2024 06 Min 18 Sec 9/20
  • A
    Anastasia Kim 27 - Oct - 2024 06 Min 21 Sec 9/20
  • S
    Shahzaib Muhammad 24 - Nov - 2024 16 Min 19 Sec 9/20
  • I
    it's syeda 19 - Sep - 2024 02 Min 47 Sec 8/20
  • H
    Hassan Shaikh 26 - Nov - 2024 03 Min 08 Sec 8/20

MCAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 In which region of the electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A. Infrared
B. Visible
C. Ultraviolet
D. X-rays
2 What is the momentum of a photon of light of wavelength 500 nm in kgm/s:
A. 1.32 × 10−21
B. 1.32 × 10−23
C. 1.32 × 10−25
D. 1.32 × 10−27
3 The minimum energy required to remove an electron is called:
A. Stopping potential
B. Work function
C. Kinetic energy
D. None of these
4 Which one is the correct express of de-Broglie equation for the length of atoms of mass m at temp? T(k=Boltzmann’s constant):
A.
5 Choose incorrect about properties of photon
A. Rest mass of photon is zero
B. A photon is never at rest
C. Photon is not deflected by electric field not by magnetic field
D. The velocity of photon is different in different media
6 The hydrogen atoms are excited to the stationary state designated by the principal quantum number n=4, the number of maximum spectral lines are observe:
A. 2
B. 3
C. 4
D. 6
7 A proton, accelerated through a p.d V has a certain de Broglie wavelength. In order to have the same de Broglie wavelength, an 𝑎 −particles must be accelerated through a potential difference:
A. 4V
B. 8V
C. V/4
D. V/8
8 An electron in the n=1 orbit hydrogen atom is bound by 13.6 eV. If a hydrogen atom is in the n=3 state, how much energy is required to ionize it:
A. 13.6 eV
B. 4.53 eV
C. 3.4 eV
D. 1.51eV
9 Maximum speed of electrons in X-rays tube which is producing X-rays photons of frequency f is
10 A photo cell receives light from a source at 50 cm away and produces 40mAcurrent inthe circuit. When the same source at is at distance 1 m from photo cell,current in the circuit will be
A. 20 mA
B. 80mA
C. 60 mA
D. 10 mA

Test Questions

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!