Physics, 26.07.2021 15:00 jasminemmathlover
Mắc hai bóng đèn Đ1(120V – 60W) và Đ2 (120V – 45W) vào mạng điện có hiệu điện thế U = 240V theo sơ đồ a và b như hình vẽ. Tìm hiệu điện thế và công suất định mức của hai đèn Đ3, và Đ4, để các đèn đều sáng bình thường
Answers: 3
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Mắc hai bóng đèn Đ1(120V – 60W) và Đ2 (120V – 45W) vào mạng điện
có hiệu điện thế U = 240V theo sơ...
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