In her physics laboratory, Mathilda shines electromagnetic ...

[Evvie72]

In her physics laboratory, Mathilda shines electromagnetic radiation on a material and collects photoelectric data to determine Planck's constant.
 
  She measures a stopping potential of 5.82 V for radiation of wavelength 100 nm, and 17.99 V for radiation of wavelength 50.0 nm. (1 eV = 1.60  10-19 J, c = 3.00  108 m/s)
  (a) Using Mathilda's data, what value does she determine for Planck's constant?
  (b) What is the work function of the material Mathilda is using, in electron-volts?

Question 2

An ac generator with a total resistance of 12  contains 100 flat loops of wire, each with an area of 0.090 m2. The loops rotate at 60 rev/s in a magnetic field of magnitude 0.50 T. What is the maximum possible induced current?
 
  A) 0.14 kA B) 23 A C) 46 A D) 0.28 kA

[briseldagonzales]

Answer to Question 1

(a) 6.49  10-34 J  s (b) 6.35 eV

Answer to Question 2

A

[Evvie72]

Excellent

[kusterl]

Great answer, keep it coming