Consider the following statements: A. The junction area of solar cell is made very narrow compared to a photo diode. B. Solar cells are not connected with any external bias. C. LED is made of lightly doped p-n junction. D. Increase of forward current results in continuous increase of LED light intensity. E. LEDs have to be connected in forward bias for emission of light. Choose the correct answer from the options given below:

Let us analyze each statement:

A. The junction area of solar cell is made very narrow compared to a photodiode.

This is false. In a solar cell, the junction area is made very large (not narrow) to capture maximum sunlight. It is the photodiode that typically has a smaller junction area.

B. Solar cells are not connected with any external bias.

This is true. Solar cells operate on the photovoltaic effect and generate their own EMF. They work without any external bias — they are essentially self-biased by the sunlight.

C. LED is made of lightly doped p-n junction.

This is false. LEDs are made of heavily doped p-n junctions to ensure high recombination rates and efficient light emission.

D. Increase of forward current results in continuous increase of LED light intensity.

This is false. Initially, increasing forward current increases light intensity, but beyond a certain point, the LED may reach saturation or get damaged. The increase is not continuous — there is a maximum rated current.

E. LEDs have to be connected in forward bias for emission of light.

This is true. LEDs emit light when electrons and holes recombine at the junction, which occurs only under forward bias.

The correct statements are B and E only.

The answer is Option A: B, E Only.