Question

Очень надо братва пожалуйстааа Помогите пожалуйста решить 1.на точечный заряд , равный 0,0004 Кл действует сила 1,2 Н . Определите модуль напряженности электрического поля в точке , где находится заряд . 2.Определите силу взаимодействия двух неподвижных точечных зарядов в воздухе q1=0.8Кл и q2=12 мкКл, находящихся на расстоянии 40 см . Как взаимодействуют заряды?

Answer 1

1) Е=F/q          E=1,2/0,0004= 3000Н/Кл
2)   F=k·q1·q2/r²=9·10в9ст·0,8·12·10в-6ст/0,4²=   540·10³Н 

Answer 2

Calculation of Electric Field Strength

To determine the electric field strength at a point where a charge is located, we can use the formula:

Electric field strength (E) = Force (F) / Charge (q)

In this case, we are given that the charge is 0.0004 C and the force is 1.2 N. Plugging these values into the formula, we can calculate the electric field strength.

E = F / q

E = 1.2 N / 0.0004 C

Calculating this expression gives us an electric field strength of 3000 N/C.

Calculation of Force between Two Charges

To calculate the force of interaction between two charges, we can use Coulomb's Law, which states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Force (F) = (k * q1 * q2) / r^2

Where: - F is the force of interaction between the charges, - k is the electrostatic constant (k = 9 x 10^9 N m^2/C^2), - q1 and q2 are the magnitudes of the charges, and - r is the distance between the charges.

In this case, we are given that q1 = 0.8 C, q2 = 12 x 10^-6 C, and r = 40 cm = 0.4 m. Plugging these values into the formula, we can calculate the force of interaction between the charges.

F = (9 x 10^9 N m^2/C^2) * (0.8 C) * (12 x 10^-6 C) / (0.4 m)^2

Calculating this expression gives us a force of interaction between the charges of 216 N.

Interaction between the Charges

The interaction between the charges can be determined based on the nature of the charges (positive or negative) and the force between them.

Since one charge is positive (q1 = 0.8 C) and the other charge is also positive (q2 = 12 x 10^-6 C), they will repel each other. This is because like charges repel each other, while opposite charges attract.

Therefore, the two charges will exert a repulsive force on each other.