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MDCAT Physics Chapter 12 Atomic spectra MCQ's Test
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Total Questions20
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Time Allowed20
MDCAT Physics Chapter 12 Atomic spectra MCQ's Test
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Question # 1
When an electron in an atom goes from a lower to higher its:
Question # 2
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 # 3
Ultraviolet radiation of 6.2 eV falls on an aluminium surface having work function โ
= ๐. ๐ ๐๐ฝ.The kinetic energy of the fastest electron emitted is:
Question # 4
In photo electric cell, the photo electric current
Question # 5
The ratio of the longest and shortest wavelength of the Lyman series is approximately:
Question # 6
Which of the following is not true?
Question # 7
The potential difference applied to an X-rays tube is increased. As a result, in the emitted radiation
Question # 8
Temperature of black body radiating at 270c is increased to 327oc, then emittedenergywill increase by
Question # 9
Monochromatic light of wavelength 300 nm is incident normally on a surface of area 4 cm2.If the intensity of light is 150 mW/m2; the rate at which photon strike the surface:
Question # 10
In electron microscope, we use high speed electrons because them
Question # 11
The threshold frequency depends on the nature on:
Question # 12
The frequency and work function of an incident photon are n and๐๐. If f0 is the threshold frequency, then necessary condition for the emission of photo electron is:
Question # 13
The de-Broglie wavelength of the particle of mass m and energy E is:
Question # 14
Light elements do not emit X-rays because
Question # 15
A proton, accelerated through a p.d V has a certain de Broglie wavelength. In order to have the same de Broglie wavelength, an ๐ โparticles must be accelerated through a potential difference:
Question # 16
Light of frequency 2 times the threshold frequency is incident on the metalsurface. Ifthe frequency is by quartered and intensity is doubled, the photoelectric becomes
Question # 17
Continuous spectrum of X-rays id due to an effect known as
Question # 18
According to Bohrโs theory, a line in the Ballmer series arises when the electron jumps from any of the higher orbits to the orbit with quantum number:
Question # 19
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:
Question # 20
Maximum speed of electrons in X-rays tube which is producing X-rays photons of frequency f is
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Biology Chapter 1 MCQ - PDF
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Download PDF with answers to study online or offline. The PDF cotnains all MCQ questions with answers for Class 10 Biology Chapter 1 - Acids and Liquids. Total questions are 12.