When the conductor was connected to a current source with an EMF of 12 V and an internal resistance of 0.5 Ohm

| April 26, 2021 | education

When the conductor was connected to a current source with an EMF of 12 V and an internal resistance of 0.5 Ohm, the Sture force in the circle was 4 A. What is the resistance of the conductor?

EMF = 12 V.

r = 0.5 ohm.

I = 4 A.

R -?

For a closed loop, we write Ohm’s law for a closed circuit, according to which the current in the circuit I is determined by the ratio of the EMF to the sum of the external resistance of the circuit R and the internal resistance of the current source r: I = EMF / (R + r).

Let us express the sum of resistances: R + r = EMF / I.

Conductor resistance R will be determined by the formula: R = EMF / I – r.

R = 12V / 4A – 0.5 ohm = 2.5 ohm.

Answer: a conductor is connected to the current source, the resistance of which is R = 2.5 ohms.



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