What units might you assign to the q and t in your formula?chocolatePI said:current = rate of flow of charge
I=q/t
but I am not sure how to use the information in the question in this context?
You're given the current value. So you know how many Coulombs per second are flowing from the cathode. How many electrons per second does that represent? (Whats the charge on every electron?)chocolatePI said:q= C - coloumbs
t= s- seconds
meaning charge A = C/s
which equation would i use to put this into ?
Put in the units and you'd be correct.chocolatePI said:so 2.8x10-6 / 1.6x10-19 for part a?
What are your thoughts? See if you can imagine a scenario where you can count the number of electrons over a known distance. Suppose, for example, the beam is switched on for exactly one second...chocolatePI said:any tips on part b?
Electrons emitted per second, or emission current, is typically measured using a device called an ammeter. This device measures the flow of electric current by detecting the movement of electrons through a circuit.
The number of electrons emitted per second can be affected by various factors such as temperature, voltage, and the type of material used. Higher temperatures and voltages can increase the rate of electron emission, while the type of material and its surface properties can also impact the emission rate.
The emission of electrons is directly related to the energy of the electrons. In order for electrons to be emitted from a material, they must have enough energy to overcome the material's work function, which is the minimum amount of energy needed to remove an electron from the material's surface.
Measuring electrons emitted per second is important in various fields such as electronics, physics, and chemistry. It helps to understand the behavior of electrons, their interactions with materials, and how they can be manipulated for practical applications.
Yes, the emission of electrons can be controlled through various methods such as applying a voltage, changing the material's surface properties, or using external stimuli like light or heat. This control over electron emission is crucial in the development of electronic devices and technologies.