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4 одинаковых ламп соединены , как показано на рисунке и подключены к одному мсточнику постоянного напряжения как изменится сила тока на цепи если лампа а перегорит
Ответы 1
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I₀ = U/(R+R/3) ток в цепи со всеми лампамиI₁ = U/(R+R/2) ток в цепи без лампы АI₁/I₀ = R(1 + 1/3)/(R(1 +1/2) = (4/3)/(3/2) = 8/9I₁ = (8/9)I₀Ответ: если перегорит лампа А ток уменьшится на 1/9 от первоначальной величины.
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Автор:
raven - 6 лет назад
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