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Free Online Mock Physics Multiple Choice Test on Xraysphotoelectriceffect
Sub Category : Xraysphotoelectriceffect Test : 7 Time Left :
1) Order of e/m ratio of proton, Alpha-particle and electron is(1) e Greater than p Greater than a (2) p Greater than Alpha Greater than e (3) e Greater than Alpha Greater than p (4) None of these
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2)The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately
(1) 540 nm (2) 400 nm (3) 310 nm (4) 220 nm
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3) A charged oil drop is suspended in a uniform field at 3 x 104 V/m so that it neither falls nor rises. The charge on the drop will be (take the mass of the charge = 9.9 x 10-15 kg and g = 10 m/s2)(1) 3.3 x 10-18 C (2) 3.2 x 10-18 C (3) 1.6 x 10-18 C (4) 4.8 x 10-18 C
1 2 3 4
4) According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photoelectrons from a metal Vs the frequency of the incident radiation gives a straight line whose slope(1) Depends on the nature of the metal used (2) Depends on the intensity of radiation (3) Depends both on the intensity of radiation and the metal used (4) Is the same for all metals and independent of the intensity of radiation
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5) According to Einsteins photoelectric equation, the graph between the kinetic energy of photoelectron ejected and the frequency of incident radiation is
1 2 3 4
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