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Photoelectric Effect (Calculation, Graph, Planck's Constant)

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A student performs a photoelectric experiment in which light of various frequencies is incident on a photosensitive metal plate. This plate, a second metal plate, and a power supply are connected in a circuit, which also contains two meters, M1 and M2, as shown above (see attachment, #1).
The student shines light of a specific wavelength λ onto the plate. The voltage on the power supply is then adjusted until there is no more current in the circuit, and this voltage is recorded as the stopping potential V_s. The student then repeats the experiment several more times with different wavelengths of light. The data, along with other values calculated from it are recorded in the table (attachment, #2).

a.) indicate which meter is used as an ammeter and which meter is used as a voltmeter by checking the appropriate spaces: Ammeter for M1 and M2, Voltmeter for M1 and M2.

b.) Use the data above to plot a graph of Kmax versus f on the zxes below, and sketch a best-fit line through the data. (graph in attachment, too)

c.) Use the best fit line from (b) to calculate an experimental value for Planck's constant.

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All parts of this Assignment solved step-by-step. Graph included.

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