The equipment is set up as in the figure below. Light from the green LED illuminates the phototube. The applied voltage dial is adjusted and measurements of V1 and V2 are made:V1 = 4.41 VV2 = 0.51 VWhat is the photocurrent in the circuit? Express your answer in SI units to 3 significant figures.Entering small numbers: Example: 1.45 x 10-6 should be entered as 1.45E-6

An LED that emits light of wavelength λ = 449 nm illuminates the phototube. A reverse bias is applied to the phototube (a voltage that opposes the current flow). This is adjusted carefully until the photocurrent drops to zero. The stopping potential is found to be Vo = 1.086 V.The LED can now be changed and the process repeated for a different λ. Then the data can be plotted to determine Planck's constant, h.For the data collected above what value would you plot on the x-axis of your graph? (Use c = 3.00 x 108m/s.)Express your answer in SI units to 3 significant figures.Entering numbers in scientific notation: Example: 1.45 x 10-9 should be entered as 1.45E-9

An LED that emits light of wavelength λ = 667 nm illuminates the phototube. A reverse bias is applied to the phototube (a voltage that opposes the current flow). This is adjusted carefully until the photocurrent drops to zero. The stopping potential is found to be Vo = 0.43 V.The LED can now be changed and the process repeated for a different λ. Then the data can be plotted to determine Planck's constant, h.For the data collected above what value would you plot on the x-axis of your graph? (Use c = 3.00 x 108m/s.)Express your answer in SI units to 3 significant figures.Entering numbers in scientific notation: Example: 1.45 x 10-9 should be entered as 1.45E-9

Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface.When green light from a mercury lamp (𝜆 = 546.1 nm) is used, a stopping potential of 0.8 V reduces the photocurrent to zero.

In the experiment performed to calculate the value of Plank's constant, the distance of the light source from a photo diode was varied and the corresponding photo current was recorded. Values of current and distance were used in derived formula to calculate planks constant.

In the experiment performed to calculate the value of Plank's constant, the distance of the light source from a photo diode was varied and the corresponding photo current was recorded. Values of current and distance were used in derived formula to calculate planks constant.Select one:TrueFalse