If the stopping potential of a metal when illuminated with a radiation of wavelength 480 nm is 1.2 v, find (a) the work function of the metal, (b) the cutoff wavelength of the metal, and (c) the maximum energy of the ejected electrons

a)

b)

c)

Explanation:

a)  

We have that for the photoelectric effect the maximum kinetic energy for the electrons is given by:

From the previous we get:

Where we used the fact that , and .

b)

The work function is defined as:

Where is the cutoff wavelength.

c)

As said before:

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a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.