In producing X-rays a beam of electrons accelerated by a potential difference V is made to strike a metal target. For what value of V, X-rays will have the lowest wavelength of 0.3094 Å (a) 10 kV(b) 20 kV(c) 30 kV (d) 40 kV
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Electron, Photon, Photoelectric Effect and X-Rays question types
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Electron, Photon, Photoelectric Effect and X-Rays questions
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If the cathode$-$anode potential difference in an $X-$ray tube be $10^5 V,$ then the maximum energy of $X-$ray photon can be
- A$10^5\ J$
- B$10^5 \ MeV$
- ✓$10^{–1}\ MeV$
- D$10^5\ KeV$
Answer: C.
View full solution →In Thomson spectrograph experiment, four positive ions $P,Q,R$ and $S$ are situated on $Y-X$ curve a shown in the figure
- ✓The specific charge of $R$ and $S$ are same
- BThe masses of $P$ and $S$ are same
- CThe specific charges of $Q$ and $R$ are same
- DThe velocities of $R$ and $S$ are same
Answer: A.
View full solution →A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current $(i)$ with distance $(d)$ of the source from the emitter
- A$a$
- B$b$
- C$c$
- ✓$d$
Answer: D.
View full solution →The value of stopping potential in the following diagram
- ✓$-4 V$
- B$-3 V$
- C$-2 V$
- D$-1 V$
Answer: A.
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