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Ohm's law is always valid. Every time. Every place. No exceptions. That's why it is called a law.
If it appears that the "law" is not being "met", then you are not taking some factor of the circuit into account. It is true that some circuits and devices exhibit dynamic resistance. Claiming that this is a violation of Ohm's law is a misunderstanding of the law.
Ohm's law does not say that resistance is constant.
Ohm's law says that resistance is voltage divided by current.
Take an ordinary 40 watt light bulb, for example. It has a cold resistance of about 27 ohms. Connect it to 120 volts, and you would expect 40 watts, but that computes to 360 ohms. Did Ohm's law fail? No. The temperature coefficient of the filament from cold to hot simply got in the way.
Remember: Resistance is voltage divided by current. Nothing more. Nothing less.
What else can I help you with?
What is AC ohm's low?
ohm's law state that in an electric current it is propotional to current
Where was georg Simon ohm born?
Ohm's most important discovery was in 1826 when he discovered the mathematical law of electric current called Ohm's law.
What is true about current?
It is measured in amps. It is related to voltage and resistance by Ohm's Law. It is the flow of electric charges.
Why ohms law is valid only for constant temperature and constant pressure?
Ohm's Law is valid for constant temperature because it assumes a fixed relationship between voltage, current, and resistance. Any changes in temperature can alter the resistance of the material, affecting the accuracy of the law. Additionally, Ohm's Law is only valid for constant pressure because pressure changes can affect the physical properties of the material, such as its conductivity, which can also impact the law's accuracy.
Who is the author of ohm's law?
OHM, who else?!
What is the name of conductor which obeys ohm's law?
Everything obeys Ohm's law - antennas, cables, transformers, integrated circuits, etc.AnswerIt is not true that 'everything' obeys Ohm's Law. For a device to obey Ohm's Law, the ratio of voltage to current MUST remain constant for variations in voltage. This is why Ohm's Law is a law of constant proportionality.
When did georg ohm dicover ohm's law?
1826 :)
Why does Ohm's Law hold true only at a constant temperature?
Ohm's Law holds true only at a constant temperature because it assumes a linear relationship between voltage, current, and resistance, which is only valid when temperature remains constant. Changes in temperature can alter the resistance of a material, leading to deviations from Ohm's Law.
An increase in voltage causes a greater?
An increase in voltage causes a greater electric current to flow in a circuit, assuming the resistance remains constant, based on Ohm's Law. This relationship is described by Ohm's Law as V=IR, where V is voltage, I is current, and R is resistance.
How is Ohm's law used to analyze an electric circuit?
Ohm's law sets the relationship between voltage, current, and resistance. Given any two, you can determine the third. In circuit analysis, you use Ohm's law to progressively determine voltage, current, and resistance of each component in the circuit. You also use Kirchoff's Current and Voltage laws, once (or before) you learn something from Ohm's law, to transfer that information from one part of the circuit to another. You use Norton and Thevanin equivalents similarly.
What is the principal of the ohm's law?
Ohm's law says that voltage is equal to current times resistance.
Can you say Ohm's law in single line?
Ohm's Law: Voltage = Current times Resistance
