A student studied how a few parameters of the electromagnetic radiation affects the I-V(current-voltage) curve of photoelectricity. By increasing one parameter he saw that the saturation current has risen. Which parameter it was?
The saturation in the I-V curve is reached when the maximum number of photo-electrons generated by the light reach the electrode and we know that photocurrent is described by I=N*e/t, where N is the number of photo-electrons. Thus we see that to increase the photocurrent we need to increase the number of electrons. To do that we increase the intensity of the light because the more photons there are the more electrons will be released due to the photo effect.
LS
Related Physics A Level answers
All answers ▸Explain the gaps within an absorption spectrum and where this may commonly occur in the universe
A uniform plank of wood of mass 32 kg and length 4.0 m is used to cross a ditch. In the ditch is a rock, which is used to support the plank horizontally 0.80 m from one end. The other end is supported by the bank. Calculate the rock's supporting force.
Is light the fastest? if no, then explain quantum entanglement!
Newton's Law of Gravitation states: F=GMm/r^2, where G is the gravitational constant (6.67×10−11m^3kg^−1s^−2). Kepler's Third Law, states t^2=kR^3. The mass of the sun is 1.99x10^30kg. Find the value of k and its units