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प्रश्न
Write clearly, why in the case of a transistor (ii) the emitter is heavily doped.
उत्तर
On the other hand, the emitter region in a transistor is heavily doped because the emitter supplies the majority carriers for the current flow.
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संबंधित प्रश्न
Write clearly, why in the case of a transistor (i) the base is thin and lightly doped
Differentiate between three segments of a transistor on the basis of their size and level of doping.
How is a transistor biased to be in active state?
When a p-n-p transistor is operated in saturation region, then its ______.
(A) base-emitter junction is forward biased and base-collector junction is reverse biased.
(B) both base-emitter and base-collector junctions are reverse biased.
(C) both base-emitter and base-collector junctions are forward biased.
(D) base-emitter junction is reverse biased and base-collector junction is forward biased
The figure shows the input waveforms A and B for ‘AND’ gate. Draw the output waveform and write the truth table for this logic gate.
Draw a typical input and output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance (r1), and (b) current amplification factor (β)
Draw typical output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine output resistance.
The output characteristic curve of a transistor at constant input current is plotted between
If an emitter current is changed by 4 mA, the collector current changes by 3.5 mA. The value of β will be ______.
Sanya performed an experiment of obtaining characteristic curves of a junction diode. When she forward biased it, she found that beyond forward voltage V = Vk, the conductivity is very high. When she reverse biased the diode she found that a very small current (of about a few microamperes) flows in the diode. It remained constant even though she varied the voltage.
(i) In Figure 1 below, which one of the diodes is forward biased?
Figure 1
(ii) What is meant by a saturation current?
(iii) When applied voltage during forward bias is small, why does no current flow in the diode?
(iv) The circuit shown in Figure 2 below contains two diodes, each with a forward resistance of 50 Ω and with infinite resistance during reverse bias. If the battery voltage is 6V, then calculate the current through the 100 Ω resistance.
Figure 2
