Interpreting an equation: Exam Question (3rd sem. intro engin. phys.)
Interpreting an equation: Exam Question (3rd sem. intro engin. phys.)
- Suppose you were to perform the photoelectric effect experiment using light of l = 250 nm and an electrode made of nickel (f = 5.2 eV). You find that when the potential difference measured across the electrodes V is equal to zero volts, the ammeter reads 0 current.
- Would the ammeter read zero or non-zero current if you replaced the nickel electrode with one made of aluminum (f = 4.2 eV)? Explain your reasoning. (from Steinberg, Oberem, & McDermott)