Question

Плоский конденсатор с площадью пластин 300 см ^2 каждая заряжен до разности потенциалов 1000 В . Расстояние между пластинами 4 см . Диэлектрик – стекло . Определить энергию поля конденсатора и плотность энергии поля .

Answer 1

W=c*U^2/2
c=e0*e*S/d=8,85*10^-12*7*300*10^-4/4*10^-2=4,65*10^-11 Ф
W=4,65*10^-11*10^6/2=2,33*10^-5 Дж
w=W/V=W/s*d=2,33*10^-5/300*10^-4*4*10^-2=19.4*10^-3 Дж/м3

Answer 2

Calculation of Capacitor Energy and Energy Density

To determine the energy of the capacitor and the energy density of the electric field, we can use the following formulas:

1. The energy stored in a capacitor is given by the formula:

E = (1/2) * C * V^2

Where: - E is the energy stored in the capacitor, - C is the capacitance of the capacitor, - V is the potential difference across the capacitor.

2. The energy density of the electric field between the capacitor plates is given by the formula:

u = (1/2) * ε * E^2

Where: - u is the energy density of the electric field, - ε is the permittivity of the dielectric material between the capacitor plates, - E is the electric field strength.

Now, let's calculate the energy and energy density of the given capacitor.

Given: - Area of each plate (A) = 300 cm^2 = 0.03 m^2 - Potential difference (V) = 1000 V - Distance between the plates (d) = 4 cm = 0.04 m - Dielectric material: glass

Calculation of Capacitance (C)

The capacitance of a parallel plate capacitor can be calculated using the formula:

C = (ε * A) / d

Where: - C is the capacitance, - ε is the permittivity of the dielectric material, - A is the area of each plate, - d is the distance between the plates.

To calculate the capacitance, we need to know the permittivity of glass. Unfortunately, the search results did not provide the necessary information to determine the permittivity of glass. Therefore, we cannot calculate the capacitance, energy, or energy density without this information.

If you have the permittivity of glass, please provide it, and I will be able to assist you further in calculating the energy and energy density of the capacitor.