| 1.3 Current (1) |
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| • | Electric
current i = dq/dt. The unit of |
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| ampere can be
derived as 1 A = 1C/s. |
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| • | A direct current (dc) is a current that |
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| remains
constant with time. |
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| • | An alternating current (ac) is a current |
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| that varies
sinusoidally with time. |
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| (reverse
direction) |
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