The given graph represents V - I characteristic for a semiconductor device. Which of the following statement is correct?

It is V - I characteristic for solar cell where, point A represents open circuit voltage and point B short circuit current

It is for a solar cell and points A and B represent open circuit voltage and current, respectively

It is for a photodiode and points A and B represent open circuit voltage and current respectively

It is for a LED and points A and B represent open circuit voltage and short circuit current, respectively

EASY

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Solar cell does not produce any ____ as it does not have any moving parts.

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Important Questions on Solids

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

Two $p$ - $n$ photodiodes are fabricated from semiconductors with band gap of $2.8 eV$ and $2.6 eV,$ respectively.

Choose the correct statement from the following.

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

LED is constructed from

G a - A s - P

semiconducting material. The energy gap of this LED is

1.9 eV

. Calculate the wavelength of light emitted and its colour.

h = 6.63 \times 10^{- 34} J - s

and

c = 3 \times 10^{8} m s^{- 1}

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

Photodiode is a device

MEDIUM

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

The given graph represents

V

I

characteristic for a semiconductor device.
Question Image

Which of the following statement is correct?

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

A photodiode may be used to detect optical signals as we observe the change in current with change in light intensity when a reverse _____ is applied.

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

In the following a statement of Assertion is followed by a statement of Reason.

Assertion: Photodiode should be used in reverse bias.

Reason: It is easier to observe the change in the current in photodiode circuit with change in the light intensity if photodiode is used in reverse bias.

HARD

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

Statement-1 : Light emiting diode (LED) emit spontaneous radiation.

Statement-2 : LED are forward-biased p-n junction.

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

An LED operates under which biasing condition?

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

An LED’s efficiency _____ as its output power decreases.

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

Dark currents in photodiode can be reduced by using a protective guard ring of _____ material.

EASY

Physics>Modern Physics>Solids>Special Purpose P-N Junction Diode

$I=I_{\mathrm {S} }\left(e^{\frac {V_{\text{D}}}{nV_{\text{T}}}}-1\right)$ ,where n is the ideality factor, also known as the quality factor or sometimes _____ coefficient.