When a metal rod is heated, not only its resistance but also its length and cross-sectional area change.The relation R = rL/A suggests that all three factors should be taken into account in measuring r at various temperatures. If the temperature changes by 1.0 C°, what percentage changes in (a) L, (b) A, and (c) R occur for a copper conductor? (d) What conclusion do you draw? The coefficient of linear expansion is 1.70 * 10-5 K-1.
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.
When a metal rod is heated, not only its resistance but also its
length and cross-sectional area change.The relation R = rL/A suggests
that all three factors should be taken into account in measuring
r at various temperatures. If the temperature changes by 1.0 C°,
what percentage changes in (a) L, (b) A, and (c) R occur for a copper
conductor? (d) What conclusion do you draw? The coefficient
of linear expansion is 1.70 * 10-5 K-1.
Trending now
This is a popular solution!
Step by step
Solved in 9 steps with 13 images
