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  3. a) in a photoelectric cell, the minimum voltage re

a) In a photoelectric cell, the minimum voltage required to reduce the current to zero is...

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Physics

a) In a photoelectric cell, the minimum voltage required toreduce the current to zero is 3.0 V. What is the maximum kineticenergy of the electrons ejected from this cell? (format of a.b x10-cd J )

b) A photon of frequency 7.2 x 1015 hz is incidentupon a metal whose threshold frequency is 8.9 x 1014 Hz,What is the speed of the photoelectron? (format of a.b x10c m/s)

c) Light with a wavelength of 425 nm falls on a photoelectricsurface that has a work function of 2.0 eV. What is the maximumspeed of any emitted photoelectrons? (format of a.b x10c m/s)

d) Electrons are ejected from a photoelectric surface with amaximum speed of 4.20 x 105 m/s. If the work function ofthe metal is 2.55 eV, what is the wavelength of the incident light?(format of a.bc x 10-d m )

e) A photoelectric cell is illuminated with white light(wavelengths from 400 nm to 700 nm). What is the maximum kineticenergy (in eV) of the electrons emitted by this surface if its workfunction is 2.30 eV ? (4 digit answer)

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