A particular wire has a resistivity of 3?10−8 Ω. ? and a cross-sectional area of 4?10−6 ?2. A length of this wire is to be used as a resistor that will receive 48 W of power when connected across a 20-V battery. What length of wire is required?
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 particular wire has a resistivity of 3?10−8 Ω. ? and a cross-sectional area of 4?10−6 ?2. A
length of this wire is to be used as a resistor that will receive 48 W of power when connected
across a 20-V battery. What length of wire is required?
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