MDCAT Physics Chapter 12 Atomic spectra Induction Online Test

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MDCAT Physics Chapter 12 Atomic spectra Induction Online Test

  • Total Questions20

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MDCAT Physics Chapter 12 Atomic spectra Induction Online Test

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Question # 1

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 # 2

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 # 3

Which of the following statement is true about soft X-rays?

Question # 4

de-Broglie wavelength associated with an electron moving at a speed of 1x106 ms-1 is

Question # 5

The ratio of the longest and shortest wavelength of the Lyman series is approximately:

Question # 6

Light of frequency 4f0 is incident on the metal of the threshold frequency f0. The maximum kinetic energy of the emitted photoelectrons is

Question # 7

electrons from the surface of a metal when:

Question # 8

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 # 9

According to Bohr’s 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 # 10

The Balmer series is found in the spectrum of:

Question # 11

If an electron is accelerated such that its K.E is 4 times of its rest mass energythen thetotal relativistic energy of electrons is about

Question # 12

Light elements do not emit X-rays because

Question # 13

The minimum energy required to remove an electron is called:

Question # 14

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

Question # 15

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 # 16

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 # 17

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

Question # 18

In photo electric cell, the photo electric current

Question # 19

Which of the following is not true?

Question # 20

The potential difference applied to an X-rays tube is increased. As a result, in the emitted radiation

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