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Ohms Law is considered one of the most asked concept.
8 Questions around this concept.
Across a metallic conductor of a non-uniform cross-section, a constant potential difference is applied. The quantity which remains constant along the conductor is:
Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then the error in the value of resistance of the wire is : (in %)
Ohm’s law
In a conductor, if all external physical conditions like temperature and pressure are kept constant the Current flowing through a conductor is directly proportional to the Potential difference across two ends.
Electric Resistance
The graph between V and I
The slope gives the resistance
The graph between V and I at different temperatures
Here T1>T2. The resistance of a conductor increases with increase in temperature
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