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What characteristic property of nuclear force explains the constancy of binding energy per nucleon (BE/A) in the range of mass number ‘A’ lying 30 < A < 170?
Concept: Mass-energy and Nuclear Binding Energy >> Nuclear Binding Energy
Show that the density of nucleus over a wide range of nuclei is constant-independent of mass number A.
Concept: Atomic Masses and Composition of Nucleus
The ratio of the nuclear densities of two nuclei having mass numbers 64 and 125 is ______.
Concept: Size of the Nucleus
Write the functions of three segments of a transistor.
Concept: Junction Transistor >> Transistor as an Amplifier (Ce-configuration)
Distinguish between 'intrinsic' and 'extrinsic' semiconductors
Concept: Extrinsic Semiconductor
With what considerations in view, a photodiode is fabricated? State its working with the help of a suitable diagram.
Even though the current in the forward bias is known to be more than in the reverse bias, yet the photodiode works in reverse bias. What is the reason?
Concept: Special Purpose P-n Junction Diodes
Define the terms : Input resistance How are these determined using typical input and output characteristics?
Concept: Junction Transistor >> Transistor as an Amplifier (Ce-configuration)
Define the terms :Current amplification factor. How are these determined using typical input and output characteristics?
Concept: Junction Transistor >> Transistor: Structure and Action
Write the truth table for the combination of the gates shown. Name the gates used.
Concept: Digital Electronics and Logic Gates
Identify the logic gates marked 'P' and 'Q' in the given circuit. Write the truth table for the combination.
Concept: Digital Electronics and Logic Gates
Using the necessary circuit diagrams, show how the V-I characteristics of a p-n junction are obtained in
Forward biasing
How are these characteristics made use of in rectification?
Concept: Special Purpose P-n Junction Diodes
Using the necessary circuit diagrams, show how the V-I characteristics of a p-n junction are obtained in
Reverse biasing
How are these characteristics made use of in rectification?
Concept: Special Purpose P-n Junction Diodes
Differentiate between three segments of a transistor on the basis of their size and level of doping.
Concept: Transistor and Characteristics of a Transistor
How is a transistor biased to be in active state?
Concept: Transistor and Characteristics of a Transistor
With the help of necessary circuit diagram, describe briefly how n-p-n transistor in CE configuration amplifies a small sinusoidal input voltage. Write the expression for the ac current gain
Concept: Junction Transistor >> Transistor as an Amplifier (Ce-configuration)
Under what condition does the transistor act as an amplifier?
Concept: Junction Transistor >> Transistor as an Amplifier (Ce-configuration)
Explain, with the help of a circuit diagram, the principle and working of a Zener diode as voltage regular.
Concept: Zener Diode as a Voltage Regulator
Explain, with the help of a circuit diagram, the working of a photo-diode. Write briefly how it is used to detect the optical signals.
Concept: p-n Junction
Mention the important considerations required while fabricating a p-n junction diode to be used as a Light Emitting Diode (LED). What should be the order of band gap of an LED if it is required to emit light in the visible range?
Concept: p-n Junction
The graph shown in the figure represents a plot of current versus voltage for a given semiconductor. Identify the region, if any, over which the semiconductor has a negative resistance.
Concept: Semiconductor Diode
