cho dòng điện i = 10A chạy qua dẫn thẳng dài , đoạn giữa được uốn thành vòng tròn bán kính 2,0 cm, đặt trong vòng bán kính 2,0 , đặt trong không khí như hình 6,0. cảm ứng từ tại tâm của vòng tròn là bao nhiêu ?

momentum of soft ball three times less than baskey ball

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

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