A motorist travels at 270 km in p hours at a certain average speed. an expression for the distance that this motorist travelled
1 answer:
You might be interested in
Answer:
E_total = 3 N / A
Explanation:
The electric field is a vector magnitude so when adding we must use vectors, in this case as the initial field E = 4N / c goes towards the axis axis and the field created by the fixed charge (E1) is also on the axis x we can add in scalar form.
E_total = E + E₁
the expression for the field of a point charge is
E₁ = k q₁ / r²
for the point x = 2m, they do not say that the total field is zero, so the charge q1 must be negative
E_total = E -k q₁ / r₂
we substitute
0 = E - k q₁ / r²
q₁ =
let's calculate
q₁ =
q₁ = 1.78 10⁻⁹ C
now we can calculate the field for position x = 4 m
E_total = 4 - 9 10⁹ 1.78 10⁻⁹ / 4²2
E_total = 3 N / A
Complete Question
Two parallel-plate capacitors C1 and C2 are connected in parallel to a 12.0 V battery. Both capacitors have the same plate area of 5.30 cm2 and plate separation of 2.65 mm. However, the first capacitor C1 is filled with air, while the second capacitor C2 is filled with a dielectric that has a dielectric constant of 2.10.
(a) What is the charge stored on each capacitor
(b) What is the total charge stored in the parallel combination?
Answer:
a
i
ii
b
Explanation:
From the question we are told that
The voltage of the battery is
The plate area of each capacitor is
The separation between the plates is
The permittivity of free space has a value
The dielectric constant of the other material is
The capacitance of the first capacitor is mathematically represented as
substituting values
The charge stored in the first capacitor is
substituting values
The capacitance of the second capacitor is mathematically represented as
substituting values
The charge stored in the second capacitor is
substituting values
Now the total charge stored in the parallel combination is mathematically represented as
substituting values