The I-V characteristic of an LED is (a) (b) (c) (d)

Answer: (a). An LED conducts only in forward bias, so its curves lie in the first quadrant. Current rises sharply after a threshold voltage that grows with band gap, i.e. from red to blue. Graph (a) shows this family of forward-bias curves; (b) and (d) are solar cell / photodiode curves, (c) is a tunnel-diode type curve. So the answer is (a).

The I-V characteristic of an LED is | JEE Main 2013

Q92JEE Main 2013Easy

Special Purpose Diodes

The $\text{I-}V$ characteristic of an $LED$ is

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Answer: (a)

An LED conducts only in forward bias, so its curves lie in the first quadrant.
Current rises sharply after a threshold voltage that grows with band gap, i.e. from red to blue.
Graph (a) shows this family of forward-bias curves; (b) and (d) are solar cell / photodiode curves, (c) is a tunnel-diode type curve.
So the answer is (a).

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