What is the difference between an analog signal and alternating current?

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An analog signal can take a continuous range of values within a specific range, while alternating current (AC) is a type of analog signal that alternates between two extreme values of opposite sign. The mathematical representation of AC, such as i(t) = I sin(2πt), demonstrates its nature by varying continuously between -I and I. Both analog signals and AC share the characteristic of being continuous, but AC specifically refers to the periodic change in direction of current. Understanding these distinctions is essential in fields like electronics and signal processing.
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what is the difference between an analog signal and alternating current??
 
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An alternating current is an analogue signal.

An analogue signal is a signal which can take a whole range of values within a certain range.

For example, i(t) = I sin(2pit) takes all the values between -I and I so it's analogue.

An alternating current is a current which alternates between two values ( two extremes ), which are of opposite sign.

i(t) is also an alternating signal.
 

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