Which of the following does not affect a material’s resistance?
the length of the material
the type of material
the temperature of the material
ohm’s law because it is to do with electrical resistance.
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The 2nd and 3rd discussions were good but didn’t discuss magnetism. The 1st guy: an open circuit has infinite resistance. Even a straight piece of wire has some self-inductance (or self-magnetism). One affect of inductance is that it opposes changes in current. So when you first apply a dc voltage across a wire and a dc current starts to flow, the self-inductance will resist the increase in current. It will appear to be because of higher resistance than expected. But the current will increase over a short time, and once it gets to a steady-state, the apparent resistance from the self-inductance is zero. This, self-inductance in a straight piece of wire, is a minor affect compared to components that presumably are in the circuit. After the current reaches steady state, the self-inductance will try to oppose a decrease in current. If the voltage and therefore the current are ac – alternating, this gets more complicated. The current is always trying to change. At the level of study I think you are, you should save this for later.
Ohm’s Law does not “affect” the resistance of a material; it is in fact the Law which defines what resistance is.
resistance increases in proportion to length
different types of material have different resistance
temperature affects resistance. (most materials increase resistance with temperature)
Ohms law doesn,t
assuming this is electrical question?!?!?!?
length does.obviously takes longer to travel.
type will.depending on conductivity of said material.
temperature will.resitance will increase/decrease depending on how hot said material is.
ohms law is a formula for determining numerous electrical equations!Source(s): me!!!!!
Ohms law is constant, thats why its a law R=V/I . All the other options are variables, therefore can change thus the resistance will change.
Resistance = (rho[resistivity of material] * length) / average cross sectonal area of material
Cooler temperature will also promote conductivity (reduce resistance).
Length of material.