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Консультация № 181076
03.12.2010, 07:13
0.00 руб.
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1
Здравствуйте, уважаемые эксперты! Прошу Вас ответить на следующий вопрос:
В двух противоположных вершинах квадрата со стороной 30 см находятся заряды 0,2 мкКл каждый. Найти напряженность поля в двух других вершинах квадрата.
В двух противоположных вершинах квадрата со стороной 30 см находятся заряды 0,2 мкКл каждый. Найти напряженность поля в двух других вершинах квадрата.
Обсуждение
03.12.2010, 11:18
общий
это ответ
Здравствуйте, Анна Юрьевна!
Дано: q1 = q2 = q = 0,2 мкКл = 0,2 • 10-6 Кл, a = 30 см = 0,3 м .
Определить: E.
Решение.
Выполним рисунок, из которого становится понятным и ход решения.
Для вычисления искомых напряжённостей имеем следующие выражения:
E1A = E2A = E1B = E2B = E = kq/a2,
EA = √(E1A2 + E2A2) = √(2E2) = E√2 = kq√2/a2,
EB = √(E1B2 + E2B2) = √(2E2) = E√2 = kq√2/a2.
После вычислений получаем
EA = EB = 9 • 109 • 0,2 • 10-6 • √2/(0,3)2 ≈ 28 • 103 (В/м).
Векторы E[sub]A[/sub] и E[sub]B[/sub] направлены в соответствии с рисунком.
Ответ: 28 • 103 В/м.
С уважением.
Дано: q1 = q2 = q = 0,2 мкКл = 0,2 • 10-6 Кл, a = 30 см = 0,3 м .
Определить: E.
Решение.
Выполним рисунок, из которого становится понятным и ход решения.
Для вычисления искомых напряжённостей имеем следующие выражения:
E1A = E2A = E1B = E2B = E = kq/a2,
EA = √(E1A2 + E2A2) = √(2E2) = E√2 = kq√2/a2,
EB = √(E1B2 + E2B2) = √(2E2) = E√2 = kq√2/a2.
После вычислений получаем
EA = EB = 9 • 109 • 0,2 • 10-6 • √2/(0,3)2 ≈ 28 • 103 (В/м).
Векторы E[sub]A[/sub] и E[sub]B[/sub] направлены в соответствии с рисунком.
Ответ: 28 • 103 В/м.
С уважением.
5
Большое спасибо!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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