What is the relationship between the maximum electric current and the intensity of incident light?
-are the inversely proportional?
What colour has the larges cutoff potential?
-is it yellow?
Is cutoff potential effected for violet light?
-no?
How do you calulate maximum kinetic...
Find the final speed of an electron, starting from rest, passing between two parallel plates with a potential difference of 5000V.
m=9.1*10^-31kg
q=1.6*10^-19C
v=sqr root of [2(1.6*10^-19)(5000)]/9.1*10^-31 = 4.2*10^7 m/s
Is this answer valid, why?
If i try this E = \lim_{q-->0} \frac{F}{q} i will get
E = \lim_{q-->0} \frac{F(x+q)-F(x)}{q} , i don't kow that the numbers are? I don't think i got the step before this
This is what i did Fe=[(9.0*10^9)(2.5*10^10-5)(3.7*10^-70]/(.25)^2 =1.332
E = F/q , but i don't know that charge at C
Is that what i do? Or what did i do wrong
PS. Is there some kind of software that i can get so i don't have to keep using ^ for exponents?
How did you figue out F_{AB} = k\frac{Q_1 Q_2}{r^2} = 6.796 * 10^{21}
k=9.0*10^9
q1= 2.5*10^-5 C
q2=-3.7*10^-7 C
r=0.35m
With those numbers i got -0.6795 N
What did i do wrong?
Also, can this problem be solved by finding electric fields separately and then adding them??
The electrostatic force between two point charges is 5.7*10^-4N. The charge on one of the point charges triples and the distant between the points doubles. What is the force between the two point charges?