Three resistors of 40 Ω, 60 Ω and 120 Ω are connected in parallel, and in this parallel group is connected in series with 15 Ω and 25 Ω.  The whole system is then connected to a 120V source.  Determine  a)  the current in the 25 Ω  b)  the potential drop in the parallel group,   c)  the potential drop in the 25 Ω   d)  the current in the 60 Ω    e)  the current in the 40 Ω

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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.