Physics-Wheatstone Bridge
NEET Physics Wheatstone Bridge MCQ Question
Type: MCQ-conceptual-Hard-Class 12
Which of the following statements about Ohm's law and resistance is correct?
A
Ohm's law applies to all conductors, as it defines the relationship between voltage, current, and resistance.
B
The resistivity of a conductor is always constant, regardless of temperature and electric field strength.
C
A diode strictly follows Ohm's law, meaning its V-I characteristics are linear.
D
Homogeneous conductors can obey Ohm's law only within specific ranges of electric field values.
Correct Answer
Option D
Detailed Explanation
Homogeneous conductors, like silver and pure germanium, obey Ohm's law only within certain ranges of electric field values, as mentioned in the context. This indicates that their resistivity may change outside these ranges.
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