Question

Две задачи, помогите пожалуйста N1) Два одинаковых заряда расположены на расстоянии 10 см друг от друга и отталкиваются с силой 18 мкН. Найдите эти заряды. N2) Электрическую лампочку сопротивлением 2,9 Ом присоединили к источнику питания с ЭДС 1,5 В. Найдите силу тока в цепи, если ток короткого замыкания у этого источника равен 15 А.

Answer 1

Смотрите решение.
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Answer 2

Task 1: Finding the Charges

To find the charges of the two identical charges that are separated by a distance of 10 cm and repel each other with a force of 18 μN, we can use Coulomb's Law. Coulomb's Law states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Let's assume the charges are q1 and q2, and the distance between them is r.

According to Coulomb's Law, the force between the charges can be calculated using the formula:

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

Where: - F is the force between the charges (18 μN) - k is the electrostatic constant (9 x 10^9 Nm^2/C^2) - q1 and q2 are the charges we want to find - r is the distance between the charges (10 cm = 0.1 m)

We can rearrange the formula to solve for the charges:

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

Substituting the given values:

q1 * q2 = (18 μN * (0.1 m)^2) / (9 x 10^9 Nm^2/C^2)

Now, let's calculate the charges using the given values:

q1 * q2 = (18 x 10^-6 N * (0.1 m)^2) / (9 x 10^9 Nm^2/C^2)

Simplifying the equation:

q1 * q2 = 2 x 10^-14 C^2

To find the charges individually, we need to find two numbers whose product is equal to 2 x 10^-14 C^2. There are multiple possible combinations of charges that satisfy this condition. Without further information, we cannot determine the exact values of q1 and q2.

Therefore, the charges of the two identical charges cannot be determined without additional information.