The electric field strength is 2.5 * 10 ^ 4 V / m at a distance of 4 m.
| March 28, 2021 | education
The electric field strength is 2.5 * 10 ^ 4 V / m at a distance of 4 m. Determine the charge that creates this field if the charge is in water.
Data: E (electric field strength) = 2.5 * 10 ^ 4 V / m; r (distance from the charge to the point taken) = 4 m; the charge is in the water.
Reference values: ε (relative dielectric constant of water) = 81; k (proportionality coefficient) = 9 * 10 ^ 9 N * m2 / Cl2.
The amount of charge is determined from the formula for calculating the field strength: E = k * q / (ε * r2), whence q = E * ε * r ^ 2 / k.
Calculation: q = 2.5 * 10 ^ 4 * 81 * 4 ^ 2 / (9 * 10 ^ 9) = 0.0036 C (3.6 mC).
Answer: The amount of charge is 3.6 mC.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
