[Solved] Which of the following is an optoelectronic device? (2024)

Question

1. Photodiode
2. LED
3. Solar Cell
4. All of these

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Q1.Choose the logic operation carried out by the following current :

Q2.Match List I with List - II.List - IList - III-V CharacteristicsDiodes(A)(I)Solar cell(B)(II)L.E.D(C)(III)Zener diode(D)(IV)Photo diodeChoose the correct answer from the options given below:

Q3.Read the following statements with reference to electronic devices.(A) A transistor is used asa rectifier(B) A zener diode is used as a voltage regulator(C) A NOT gate is a universal gate(D) A transistor is used as an amplifier(E) A photodiode is used as an oscillatorChoose the correct answer from the options given below:

Q4.Match List - I with List - II.List - IList - II(Electronic device)(Use/Application)(A)Photo diode(I)Remote controls(B)Zener diode(II)Amplifier(C)Light emitting diode(III)Voltage regulator(D)Transistor(IV)PhotodetectorChoose the correct answer from the options given below :

Q5.When a forward bias is applied to a p-n junction diode, then :

Q6.In the circuit diagram of a band pass filter shown below, R = 10 kΩ.In order to get a lower cut-off frequency of 150 Hz and an upper cut-off frequency of 10 kHz, the appropriate values of C1and C2respectively are

Q7.In a collector feedback circuit shown in the figure below, the base emitter voltage VBE= 0.7 V and current gain β=\(\frac{{{{\rm{I}}_{\rm{C}}}}}{{{{\rm{I}}_{\rm{B}}}}}\) = 100 for the transistor.The value of the base current IB is

Q8.A sinusoidal voltage of r.m.s value of 220 V is connected to the junction diode and a capacitor C in the circuit shown below. Here half wave rectification occurs. The final potential difference (in volts) across C is _______.

Q9.A good amplifier is one which has ______input resistance and ________output resistance.

Q10.In a half wave rectifier circuit, operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be

Q1.One-fourth chain of mass M and length L is hanging down from a table. The work done to pull the hanging part of the chain on to the table is

Q2.One bar is equal to

Q3.Which of the following is not true for the cathode rays ?

Q4.For a maximum horizontal range of a projectile, the angle of projection should be

Q5.The phenomenon of scattering of light by the colloidal particles is called :

Q6.Which of the following colours is least scattered by fog?

Q7.The phenomenon of scattering of light by the colloidal particles is called :

Q8.The potential difference, V, across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains the same. This is called ______ law.

Q9.A boy of height 1 m stands infront of a convex mirror. His distance from the mirror is equal to the focal length of the mirror, the height of the image is :

Q10.The radius of curvature of the curved surface of a plano-convex lens is 20 cm. If the refractive index of the material of the lens be 1.5, then focal length of lens will be: