Optoelectronic Junction Devices (Photodiode,LED,Solar Cell)
Semiconductor Electronics Material Devices and Simple Circuits

150980 Given below are two Statements : one is labelled as Assertion A and the other is labelled as Reason \(\mathrm{R}\)
Assertion A: Photodiodes are preferably Operated in reverse bias condition for light intensity measurement.
Reason R: The current in the forward bias is more than the current in the reverse bias for a p-n junction diode.
In the light of the above statement, choose correct answer from the option given the below:

1 \(\mathrm{A}\) is true but \(\mathrm{R}\) is false
2 Both \(\mathrm{A}\) and \(\mathrm{R}\) are true and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\)
3 \(\mathrm{A}\) is false but \(\mathrm{R}\) is true
4 Both A and R are true but R is NOT the correct explanation of \(\mathrm{A}\)
Semiconductor Electronics Material Devices and Simple Circuits

150990 An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is \(1.9 \mathrm{eV}\). Then, the wavelength of the emitted light is :

1 \(6.5 \times 10^{-7} \mathrm{~m}\)
2 \(2.9 \times 10^{-9} \mathrm{~m}\)
3 \(9.1 \times 10^{-5} \mathrm{~m}\)
4 \(1.6 \times 10^{-8} \mathrm{~m}\)
Semiconductor Electronics Material Devices and Simple Circuits

150993 For LED's to emit light in visible region of electromagnetic radiation, it should have energy band gap in the range of

1 \(0.1 \mathrm{eV}\) to \(0.4 \mathrm{eV}\)
2 \(0.5 \mathrm{eV}\) to \(0.8 \mathrm{eV}\)
3 \(0.9 \mathrm{eV}\) to \(1.5 \mathrm{eV}\)
4 \(1.6 \mathrm{eV}\) to \(3.2 \mathrm{eV}\)
Semiconductor Electronics Material Devices and Simple Circuits

150995 The three basic processes of generation of \(\mathrm{emf}\) by a solar cell is due to

1 Generation, separation and collection
2 Rectification, separation and collection
3 Generation, amplification and rectification
4 Collection, amplification and rectification
Semiconductor Electronics Material Devices and Simple Circuits

150997 When light falls on a solar cell, the generation of emf happens due to

1 generation of electron-hole pairs only
2 generation and collection of electron-hole pairs only
3 collection of electron-hole pairs only
4 generation, separation and collection of electron-hole pairs
5 separation and collection of electron-hole pairs only
Semiconductor Electronics Material Devices and Simple Circuits

150980 Given below are two Statements : one is labelled as Assertion A and the other is labelled as Reason \(\mathrm{R}\)
Assertion A: Photodiodes are preferably Operated in reverse bias condition for light intensity measurement.
Reason R: The current in the forward bias is more than the current in the reverse bias for a p-n junction diode.
In the light of the above statement, choose correct answer from the option given the below:

1 \(\mathrm{A}\) is true but \(\mathrm{R}\) is false
2 Both \(\mathrm{A}\) and \(\mathrm{R}\) are true and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\)
3 \(\mathrm{A}\) is false but \(\mathrm{R}\) is true
4 Both A and R are true but R is NOT the correct explanation of \(\mathrm{A}\)
Semiconductor Electronics Material Devices and Simple Circuits

150990 An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is \(1.9 \mathrm{eV}\). Then, the wavelength of the emitted light is :

1 \(6.5 \times 10^{-7} \mathrm{~m}\)
2 \(2.9 \times 10^{-9} \mathrm{~m}\)
3 \(9.1 \times 10^{-5} \mathrm{~m}\)
4 \(1.6 \times 10^{-8} \mathrm{~m}\)
Semiconductor Electronics Material Devices and Simple Circuits

150993 For LED's to emit light in visible region of electromagnetic radiation, it should have energy band gap in the range of

1 \(0.1 \mathrm{eV}\) to \(0.4 \mathrm{eV}\)
2 \(0.5 \mathrm{eV}\) to \(0.8 \mathrm{eV}\)
3 \(0.9 \mathrm{eV}\) to \(1.5 \mathrm{eV}\)
4 \(1.6 \mathrm{eV}\) to \(3.2 \mathrm{eV}\)
Semiconductor Electronics Material Devices and Simple Circuits

150995 The three basic processes of generation of \(\mathrm{emf}\) by a solar cell is due to

1 Generation, separation and collection
2 Rectification, separation and collection
3 Generation, amplification and rectification
4 Collection, amplification and rectification
Semiconductor Electronics Material Devices and Simple Circuits

150997 When light falls on a solar cell, the generation of emf happens due to

1 generation of electron-hole pairs only
2 generation and collection of electron-hole pairs only
3 collection of electron-hole pairs only
4 generation, separation and collection of electron-hole pairs
5 separation and collection of electron-hole pairs only
Semiconductor Electronics Material Devices and Simple Circuits

150980 Given below are two Statements : one is labelled as Assertion A and the other is labelled as Reason \(\mathrm{R}\)
Assertion A: Photodiodes are preferably Operated in reverse bias condition for light intensity measurement.
Reason R: The current in the forward bias is more than the current in the reverse bias for a p-n junction diode.
In the light of the above statement, choose correct answer from the option given the below:

1 \(\mathrm{A}\) is true but \(\mathrm{R}\) is false
2 Both \(\mathrm{A}\) and \(\mathrm{R}\) are true and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\)
3 \(\mathrm{A}\) is false but \(\mathrm{R}\) is true
4 Both A and R are true but R is NOT the correct explanation of \(\mathrm{A}\)
Semiconductor Electronics Material Devices and Simple Circuits

150990 An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is \(1.9 \mathrm{eV}\). Then, the wavelength of the emitted light is :

1 \(6.5 \times 10^{-7} \mathrm{~m}\)
2 \(2.9 \times 10^{-9} \mathrm{~m}\)
3 \(9.1 \times 10^{-5} \mathrm{~m}\)
4 \(1.6 \times 10^{-8} \mathrm{~m}\)
Semiconductor Electronics Material Devices and Simple Circuits

150993 For LED's to emit light in visible region of electromagnetic radiation, it should have energy band gap in the range of

1 \(0.1 \mathrm{eV}\) to \(0.4 \mathrm{eV}\)
2 \(0.5 \mathrm{eV}\) to \(0.8 \mathrm{eV}\)
3 \(0.9 \mathrm{eV}\) to \(1.5 \mathrm{eV}\)
4 \(1.6 \mathrm{eV}\) to \(3.2 \mathrm{eV}\)
Semiconductor Electronics Material Devices and Simple Circuits

150995 The three basic processes of generation of \(\mathrm{emf}\) by a solar cell is due to

1 Generation, separation and collection
2 Rectification, separation and collection
3 Generation, amplification and rectification
4 Collection, amplification and rectification
Semiconductor Electronics Material Devices and Simple Circuits

150997 When light falls on a solar cell, the generation of emf happens due to

1 generation of electron-hole pairs only
2 generation and collection of electron-hole pairs only
3 collection of electron-hole pairs only
4 generation, separation and collection of electron-hole pairs
5 separation and collection of electron-hole pairs only
Semiconductor Electronics Material Devices and Simple Circuits

150980 Given below are two Statements : one is labelled as Assertion A and the other is labelled as Reason \(\mathrm{R}\)
Assertion A: Photodiodes are preferably Operated in reverse bias condition for light intensity measurement.
Reason R: The current in the forward bias is more than the current in the reverse bias for a p-n junction diode.
In the light of the above statement, choose correct answer from the option given the below:

1 \(\mathrm{A}\) is true but \(\mathrm{R}\) is false
2 Both \(\mathrm{A}\) and \(\mathrm{R}\) are true and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\)
3 \(\mathrm{A}\) is false but \(\mathrm{R}\) is true
4 Both A and R are true but R is NOT the correct explanation of \(\mathrm{A}\)
Semiconductor Electronics Material Devices and Simple Circuits

150990 An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is \(1.9 \mathrm{eV}\). Then, the wavelength of the emitted light is :

1 \(6.5 \times 10^{-7} \mathrm{~m}\)
2 \(2.9 \times 10^{-9} \mathrm{~m}\)
3 \(9.1 \times 10^{-5} \mathrm{~m}\)
4 \(1.6 \times 10^{-8} \mathrm{~m}\)
Semiconductor Electronics Material Devices and Simple Circuits

150993 For LED's to emit light in visible region of electromagnetic radiation, it should have energy band gap in the range of

1 \(0.1 \mathrm{eV}\) to \(0.4 \mathrm{eV}\)
2 \(0.5 \mathrm{eV}\) to \(0.8 \mathrm{eV}\)
3 \(0.9 \mathrm{eV}\) to \(1.5 \mathrm{eV}\)
4 \(1.6 \mathrm{eV}\) to \(3.2 \mathrm{eV}\)
Semiconductor Electronics Material Devices and Simple Circuits

150995 The three basic processes of generation of \(\mathrm{emf}\) by a solar cell is due to

1 Generation, separation and collection
2 Rectification, separation and collection
3 Generation, amplification and rectification
4 Collection, amplification and rectification
Semiconductor Electronics Material Devices and Simple Circuits

150997 When light falls on a solar cell, the generation of emf happens due to

1 generation of electron-hole pairs only
2 generation and collection of electron-hole pairs only
3 collection of electron-hole pairs only
4 generation, separation and collection of electron-hole pairs
5 separation and collection of electron-hole pairs only
Semiconductor Electronics Material Devices and Simple Circuits

150980 Given below are two Statements : one is labelled as Assertion A and the other is labelled as Reason \(\mathrm{R}\)
Assertion A: Photodiodes are preferably Operated in reverse bias condition for light intensity measurement.
Reason R: The current in the forward bias is more than the current in the reverse bias for a p-n junction diode.
In the light of the above statement, choose correct answer from the option given the below:

1 \(\mathrm{A}\) is true but \(\mathrm{R}\) is false
2 Both \(\mathrm{A}\) and \(\mathrm{R}\) are true and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\)
3 \(\mathrm{A}\) is false but \(\mathrm{R}\) is true
4 Both A and R are true but R is NOT the correct explanation of \(\mathrm{A}\)
Semiconductor Electronics Material Devices and Simple Circuits

150990 An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is \(1.9 \mathrm{eV}\). Then, the wavelength of the emitted light is :

1 \(6.5 \times 10^{-7} \mathrm{~m}\)
2 \(2.9 \times 10^{-9} \mathrm{~m}\)
3 \(9.1 \times 10^{-5} \mathrm{~m}\)
4 \(1.6 \times 10^{-8} \mathrm{~m}\)
Semiconductor Electronics Material Devices and Simple Circuits

150993 For LED's to emit light in visible region of electromagnetic radiation, it should have energy band gap in the range of

1 \(0.1 \mathrm{eV}\) to \(0.4 \mathrm{eV}\)
2 \(0.5 \mathrm{eV}\) to \(0.8 \mathrm{eV}\)
3 \(0.9 \mathrm{eV}\) to \(1.5 \mathrm{eV}\)
4 \(1.6 \mathrm{eV}\) to \(3.2 \mathrm{eV}\)
Semiconductor Electronics Material Devices and Simple Circuits

150995 The three basic processes of generation of \(\mathrm{emf}\) by a solar cell is due to

1 Generation, separation and collection
2 Rectification, separation and collection
3 Generation, amplification and rectification
4 Collection, amplification and rectification
Semiconductor Electronics Material Devices and Simple Circuits

150997 When light falls on a solar cell, the generation of emf happens due to

1 generation of electron-hole pairs only
2 generation and collection of electron-hole pairs only
3 collection of electron-hole pairs only
4 generation, separation and collection of electron-hole pairs
5 separation and collection of electron-hole pairs only