MDCAT Physics Chapter 12 Atomic spectra Induction Online Test With Answers

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MDCAT Physics Chapter 12 Atomic spectra Induction Online Test

Sr. # Questions Answers Choice
1 In which region of the electromagnetic spectrum does the Lyman series of hydrogen atom lie? Infrared Visible Ultraviolet X-rays
2 A proton and an π‘Ž βˆ’ π’‘π’‚π’“π’•π’Šπ’„π’π’† are accelerated through same voltage, the ratio of their de- Broglie wavelength will be: 1:2 √2: 1 2√2: 1 2:1
3 The de-Broglie wavelength of the particle of mass m and energy E is: ℎ 𝜆 = ℎ√2𝑚𝐸 𝜆 =<span style="white-space:pre"> </span>1
4 Threshold wavelength for metal having work function 𝝋 is 𝝀. What is the threshold wavelength for metal having work function 2 π’Šπ’”: /𝟐 2 4 𝝀/𝟒
5 When ultraviolet rays are incident in metal plate, then photoelectric effect does not occur. It occurs by the incidence of: x-rays Infrared rays Radio wave Greenhouse effect
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: 2 3 4 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 π‘Ž βˆ’particles must be accelerated through a potential difference: 4V 8V V/4 V/8
8 As the intensity of incident light increases: Photoelectric current increases Photoelectric current decreases Kinetic energy of emitted photoelectrons increases Kinetic energy of emitted photoelectrons decreases
9 To find longest wavelength radiation in Ballmer series, the value of n used is: 2 3 4 ∞
10 Maximum speed of electrons in X-rays tube which is producing X-rays photons of frequency f is
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