Why does current go to zero at some negative voltage

Reference no: EM13983703

This graph represents current vs voltage for 200nm light shining onto Cadmium (Cd) which has a work function of 4.07 eV. In the following questions you will be explaining why this curve has the shape that it does.

1756_Current vs voltage.png

a) Why is current level for V>0? (Why is there a current when voltage is greater than zero?) Why does current start decreasing steadily at V<0?

b) Why does current go to zero at some negative voltage and what determines that voltage?

c) Draw on the graph to show how the curve will change if:

i) the intensity is increased.

ii) the light frequency is increased while the number of photons is held constant.

Reference no: EM13983703

Questions Cloud

Practice with defining and using python module : Design a Python module by incorporating the two functions, greatest_trivial_factor andisPalindrome, you defined in previous lab assignments. In other words, your Python module will contain ONLY those two functions. Name your module file aslib_yourfi..

Describe the sample space : Describe the sample space ?. What is the probability that three tosses will be required?

Functions is performed by the loader : Which of the following functions is/ are performed by the loader? A. Allocate space in memory for the programs and resolve symbolic references between object decks B. Physically place the machine instructions and data into memory

What if such an earthquake were to hit a waste depot : Wikipedia indicates the approximate energy released by an earthquake relative to the destructive power of TNT With reasonably large quakes (> 4.0 on the Richter Scale), the energy dissipated is of the order of Giga-joules. If a seam (Uranium, Thor..

Why does current go to zero at some negative voltage : Why does current go to zero at some negative voltage and what determines that voltage? Draw on the graph to show how the curve will change if the intensity is increased.

Unix shell programming : Write a program called home5. Write a program called home that takes the name of a user as its single argument and prints that user's home directory. So home steve would print /users/ steve if /users/ steve is steve's home directory.

What is their frequency : Wind gusts create ripples on the ocean that have a wavelength of 5.00 cm and propagate at 2.00 m/s. What is their frequency?

How much heat entered or left the helium during segments : How much heat entered or left the helium during segments ab, bc, and ca? By how much did the internal energy of the He change from a to b, from b to c, and from c to a?

What is the direction of the induced current in the loop : For the wire arrangement in the figure, a = 12.9 cm and b = 17.3 cm. The current in the long straight wire is given by i = 5.86t2 - 13.1t, where i is in amperes and t is in seconds. Find the emf in volts in the square loop at t = 4.38 s.

User Account

All Pages