Determine the internal resistance of the current source with an emf equal to 6V if
| December 29, 2020 | education
Determine the internal resistance of the current source with an emf equal to 6V if, with an external resistance of 5 ohms, the current in the circuit is 1 A.
The EMF of the current source can be calculated by the formula:
Еі = I * (R + r), where Σ is the electromotive force (EMF, Еі = 6 V), I is the current in the circuit (I = 1А), R is the external resistance of the source (R = 5 Ohms), r is internal resistance of the source (r = 5 Ohm).
Let’s express and calculate the internal resistance of the source:
Еі = I * (R + r).
R + r = Еі / I.
r = Еі / I – R = 6/1 – 5 = 6 – 5 = 1 Ohm.
Answer: The internal resistance of the source is 1 ohm.
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