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.
If a potential difference of 39.9 V is applied between points a and b in the diagram below, find the current in R1 (in Ampere).
Given : R1 = 7.2 Ω, R2 = 1.0 Ω, R3 = 6.3 Ω and R4 = 6.2 Ω.
R1 = 7.2 ohm
R2 = 1 ohm
R3 = 6.3 ohm
R4 = 6.2 ohm
V = 39.9 volts
R2 and R3 are in parallel, their equivalent resistance = (1) (6.3) /(1+6.3)
= 0.86 ohm
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