When you shock your self because of a door knob this is an example of
2 answers:
You might be interested in
Answer:
The number of excess electrons are on the negative surface is
Explanation:
Given that,
Distance =1.5 cm
Side = 22 cm
Electric field = 18000 N/C
We need to calculate the capacitance in the metal plates
Using formula of capacitance
Put the value into the formula
We need to calculate the potential
Using formula of potential
Put the value into the formula
We need to calculate the charge
Using formula of charge
Put the value into the formula
Here, the charge on both the positive and negative plates
We need to calculate the number of excess electrons are on the negative surface
Using formula of number of electrons
Put the value into the formula
Hence, The number of excess electrons are on the negative surface is
Answer:
a) λ = 121.5 nm , b) 102.6, 97, 91.1 nm
Explanation:
Bohr's model describes the energy of the hydrogen atom
= k² e² / 2m (1 / n²)
A transition occurs when the electron passes from n level to a lower one
-
= k² e² / 2m (1 /
² - 1 /
²)
Planck's relationship is
E = h f = h c / lam
hc /λ = k² e²/ 2m(1 / ² - 1 /
²)
1 / λ = [k² e² / 2m h c] (1 / ² - 1 /
²)
1 /λ = Ry] (1 / ² - 1 /
²)
a) the first element of the series occurs for = 2
1 / λ = 1.097 10⁷ (1- 1/2²)
1 / λ = 1.097 10⁷ (1- 0.25)
1 / λ = 0.82275 10⁷
λ = 1.215 10⁻⁷ m
λ = 1,215 10⁻⁷ m (10⁹nm / m)
λ = 121.5 nm
b) the next elements of the series occur to
1 /λ λ (10-7m) λ (nm)
3 1 1,097 10⁷ (1-1 / 9) 1,0255 102.6
4 1 1,097 10⁷ (1-1 / 16) 0.9723 97.2
∞ 1 1,097 10⁷ (1 - 0) 0.91158 91.1