Radiation, with wavelength 6561 A falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 \times 10^{-4} T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to : [9 Jan 2020 Shift 1]

JEE Main 9 Jan 2020 Shift 1 Solved Paper

Section: Physics

Question : 11 of 75

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Radiation, with wavelength 6561 A falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3×10−4 T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to :

[9 Jan 2020 Shift 1]

1.8 eV
1.1 eV
0.8 eV
1.6 eV

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