Q.

Ohmic devices have a current-voltage graph that looks like this:

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a

 The curve that is bi-linear

b

The curve of the parabola

c

The curve that is linear 

d

 The curve that is non-linear

answer is D.

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Detailed Solution

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Ohm's Law

The potential difference across the ends of a conductor is precisely proportional to the electric current flowing through it.

The formula is as follows:

V = IR

An ohmic device is one that obeys Ohm's law for all voltages applied to it.

The ohmic device's current-voltage graph is a straight line.

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Ohmic devices have a current-voltage graph that looks like this: