When the voltage at the ends of the conductor is 12V, the current is 2A. What is the current at a voltage of 3V?

To determine the current in the used conductor, we use the equality: U0 / I0 = R (constant resistance) = U1 / I1, whence I1 = U1 * I0 / U0.
Values of variables: U1 – considered voltage (U1 = 3 V); I0 – initial current strength (I0 = 2 A); U0 – initial voltage (U0 = 12 V).
Let’s perform the calculation: I1 = U1 * I0 / U0 = 3 * 2/12 = 0.5 A.
Answer: The current strength is 0.5 A.

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