Table of Contents
How is heat directly proportional to resistance?
(i) Heat produced in the circuit is directly proprotional to the resistance if a constant current is flowing through a circuit, because H=I2RtorH∝R. It is so in series combination of resistors. It is so in parallel combination of resistors.
As electrons move through a metal conductor, some collide with atoms, other electrons or impurities. These collisions cause resistance and generate heat. Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance.
Is heat directly proportional to current?
Joule’s law states the amount of heat production in a conductor is : Directly proportional to the square of electric current flowing through it.
Is current is directly proportional to resistance?
Current is inversely proportional to the resistance. A threefold increase in the resistance would cause a threefold decrease in the current.
Why does the heater having low resistance get heated more?
If you use a very small resistance AND the circuit design is such that the voltage drop is across the resistance of the heating-wire-circuit, [nothing else in the circuit is limiting current flow] you will get more heating.
Is heat directly proportional to potential difference?
According to Joule’s law, if the potential difference across a conductor having a material of specific resistance remains constant, then the heat produced in the conductor is directly proportinal to. is constant as per given conditons so PProp1p.
Is heat inversely proportional to resistance?
The voltage drop will be correspondingly larger too. But at constant voltage, joule heating is inversely proportional to resistance. If you put a larger resistance across the same voltage, you will dissipate less heat, because much less current will be drawn.
How does the heat produced depend on the current in the conductor if resistance is constant?
The amount of heat produced in current conducting wire, is proportional to the square of the amount of current that is flowing through the circuit, when the electrical resistance of the wire and the time of current flow is constant.