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प्रश्न
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उत्तर
According to Ohm’s law, the current flowing in a conductor is directly proportional to the potential difference across its ends, provided the physical conditions and temperature of the conductor remain constant.
No, it is not always true. E.g., Diode valve, junction diode, etc., do not obey Ohm’s law.
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संबंधित प्रश्न
Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?
Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?
Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm’s law.
What is the necessary condition for a conductor to obey Ohm’s law?
An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
Define Current density.
Define temperature coefficient of resistance.
Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its limitation.
Assertion: The statement of Ohm’s law is K = IR.
Reason: V = IR is the equation which defines resistance.
State Ohm's Law. Represent it mathematically.
