FIGURE 22.21 The basic circuit of a battery and a bulb. (a) (b) The filament of Filament 00 - Glass bulb filled with inert gas the bulb and the connecting wires make a continuous path between the battery terminals. Connecting wires + Metal- - Insulator
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.
A current flows in a circuit that consists of a lightbulb and a battery, as in 22.21b of this chapter. How do the electrons in the bulb’s filament, far from the battery and its emf, “know” that they should flow?
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