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Stopping Potential

In photoelect...

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In photoelectric experiment, the collector plate is at 2V with respect to emitter plate(phi= 4.5eV). The emitter is illuminated by a source of monochromatic light of wavelength 200nm. The minimum and maximum kinetic energy of photoelectrons reaching collector is: 1. 0, 1.7eV 2. 2eV, 3.7eV 3. 1.5eV, 4.3eV 4. 3eV, 5.2eV Give the solution also

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Q. In a photoelectric experiment, the collector plate is at 2.0 V with respect to the emitter plate made of copper (φ = 4.5 eV). The emitter is illuminated by a source of monochromatic light of wavelength 200 nm. Find the minimum and maximum kinetic energy of the photoelectrons reaching the collector.

Q. In a photoelectric experiment, the collector plate is at 2.0V with respect to the emitter plate made of copper

(ϕ = 4.5 e V)

. the emitter is illuminated by a source of monochromatic light of wavelength 200 nm.

Q. In an experiment on photoelectric effect, Light of wavelength 800 nm (less than threshold wavelength) is incident on a cesium plate at the rate of 5.0 W. The potential of the collector plate is made sufficiently positive with respect on the emitter so that the current reaches its saturation value. Assuming that on the average one of every

10^{6}

photons is able to eject a photoelectron, find the photo current in the circuit.

Q. The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate. A light source is put on and a saturation photocurrent is recorded. An electric field is switched on that has a vertically downward direction.
(a) The photocurrent will increase.
(b) The kinetic energy of the electrons will increase.
(c) The stopping potential will decrease.
(d) The threshold wavelength will increase.

Q. In an experiment on photoelectric effect, light of wavelength

400 nm

is incident on a caesium plate at the rate of

5.0 W

. The potential of the collector plate is made sufficiently positive with respect to the emitter so that the current reaches its saturation value. Assuming that on the average, one out of every

10^{6}

photons is able to eject a photoelectron, find the photocurrent in the circuit.
[Use

h c = 1240 eV (nm)

]

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