The current in a single-loop circuit with one resistance R is 5.0A. When an additional resistance of 2.0 Ω is inserted in series with R, the current drops to 4.0 A. What is R?

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A: Ans:- Image-1

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Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.