Which of the following is an ohmic conductor

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Transistor

Vacuum tube

Electrolyte

Nichrome wire

answer is D.

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Detailed Solution

Concept: An ohmic conductor is defined as a conductor that adheres to or obeys Ohm's Law, which asserts that the current flowing through a resistor is directly proportionate to the potential difference across its two ends. So, for ohmic conductors, the V-I graph will be a straight line across the origin.
According to Ohm's Law, "The current I flowing through a conductor is precisely proportional to the potential difference V applied between the two ends of a conductor." The resistance R of the circuit is referred to as the proportionality constant. As a result, Ohm's Law is written as V=IR, which is equivalent to the equation line y=mx, which denotes a straight line travelling through the origin.
Ohmic conductors are currently those conductors that adhere to Ohm's Law and whose resistance does not change with temperature, whereas non-Ohmic conductors are those that do not adhere to Ohm's Law and whose resistance may alter with changes in temperature Non-Ohmic conductors: We are aware that, up to a certain voltage (referred to as the threshold voltage) , very little current is visible in a transistor. The current also increases sharply after the threshold voltage. Thus, there is no linear relationship between voltage and current. The transistor is a non-ohmic conductor as a result.
There are no charged particles in a vacuum that may conduct electricity. The vacuum thus serves as an insulator. There are two types of electrolytes: ohmic and non-ohmic. Generally speaking, we can determine whether an electrolyte is an ohmic conductor or not. Many appliances employ the Nichrome wire, an alloy of nickel, chromium, and some iron, as a resistance wire.
Hence, the correct option is 4.

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