Question

Работа при переносе заряда 2*10^-7 Кл из бесконечности в некоторую точку

Answer 1

A = q (φ2-φ1)
φ2 = kQ/r2^2  некоторая точка
φ1= kQ/r1^2 = 0 , так как  r1  - бесконечность

Answer 2

Calculating Work Done in Moving Charge

To calculate the work done in moving a charge of 2*10^-7 C from infinity to a certain point, we can use the formula for the work done in moving a charge against an electric field. The work done (W) is given by the formula:

W = q * V

Where: - q = charge - V = potential difference

In this case, the charge is 2*10^-7 C. We need to find the potential difference to calculate the work done.

Finding Potential Difference

To find the potential difference, we can use the formula:

V = k * (q / r)

Where: - k = Coulomb's constant - q = charge - r = distance from the point to infinity

Using the given charge of 2*10^-7 C, we can calculate the potential difference.

Calculation

Using the formula V = k * (q / r), where k is the Coulomb's constant, q is the charge, and r is the distance from the point to infinity, we can calculate the potential difference.

V = (8.99 * 10^9 Nm^2/C^2) * (2 * 10^-7 C / r)

This will give us the potential difference at the given distance from infinity.

Conclusion

By using the formula for the work done in moving a charge against an electric field and calculating the potential difference, we can determine the work done in moving a charge of 2*10^-7 C from infinity to a certain point.