What is Ohm's law? Distinguish between resistance and resistivity?
Answers
Answer:
ohm's law states that v is proportional to i. that is the current flowing through a conductor is directly proportional to potential difference between its ends. resistance is the obstruction to the flow of current. resistivity= resisitance * length of conductor/area of crossection. A measure of resisting power of a specified material to the flow of current
Answer
Ohm's law
The term Ohm's law refers to one of the fundamental relationships found in electronic circuits: that, for a given resistance, current is directly proportional to voltage. In other words, if you increase the voltage through a circuit whose resistance is fixed, the current goes up.
Resistance
The electrical resistance of a circuit component or device is defined as the ratio of the voltage applied to the electric current which flows through it: If the resistance is constant over a considerable range of voltage, then Ohm's law, I = V/R, can be used to predict the behavior of the material.
resistivity
Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction. ... Materials that conduct electrical current easily are called conductors and have a low resistivity.