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.
18.6
Find the current in the 12-Ω resistor in the figure below. (Assume R1 = R3 = 3.6 Ω, R2 = R4 = 9.0 Ω, ΔV = 17 V.)
A
A rectangular circuit begins at the positive terminal of a battery labeled ΔV which is on the bottom side of the rectangle. The positive terminal is to the left of the negative terminal. The circuit extends left, up and then right to a resistor labeled R3 on the top side of the rectangle. To the right of R3 the circuit splits into two parallel horizontal branches.
- The top branch passes through a resistor labeled R1then splits into two parallel horizontal sub-branches. The top sub-branch has a resistor labeled R2. The bottom sub-branch has a resistor labeled R4. The sub-branches then recombine.
- The bottom branch splits into two parallel horizontal sub-branches. There is a 4.0 Ωresistor on the top sub-branch and a 12 Ω resistor on the bottom sub-branch. The sub-branches then recombine and the bottom branch extends to the right to a 2.0 Ω
The top and bottom branches then recombine and the circuit extends down and to the left until it reaches the negative terminal of the battery.
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