Advertisements
Advertisements
Questions
Define β
Define the current gain βDC for a transistor.
Advertisements
Solution
The dc common-emitter current ratio or current gain (βdc) is defined as the ratio of the collector current (IC) to base current (IB).
`beta_"dc" = "I"_"C"/"I"_"B"`
RELATED QUESTIONS
In a BJT, the largest current flow occurs ______.
Why is the base of a transistor made thin and is lightly doped?
In a common-base connection, the emitter current is 6.28 mA and the collector current is 6.20 mA. Determine the common-base DC current gain.
Derive the relation between α and β.
In a common base configuration, the transistor has an emitter current of 10 mA and a collector current of 9.8 mA. The value of base current is ______
Explain the working of the PNP transistor?
Draw the circuit symbol for NPN and PNP transistors. What is the difference in the Emitter, Base, and Collector regions of a transistor?
The principle based on which a solar cell operates is ____________.
Give the Barkhausen conditions for sustained oscillations.
Sketch the static characteristics of a common emitter transistor and bring out the essential features of input and output characteristics.
Describe the function of a transistor as an amplifier with the neat circuit diagram. Sketch the input and output wave forms.
In the circuit shown in the figure, the BJT has a current gain (β) of 50. For an emitter-base voltage VEB = 600 mV, calculate the emitter-collector voltage VEC (in volts).
In a common emitter amplifier, the input resistance is 1000 Ω, the peak value of Input signal voltage is 5 mV, and β = 60. The peak value of output current is
If l1, l2, l3 are the lengths of the emitter, base and collector of a transistor, then ____________.
In the study of transistor as an amplifier, the ratio of collector current to emitter current is 0.98 then the ratio of collector current to base current will be ______.
In switching circuit, transistor is in ON state, values of IE and lB are 10 mA and 0.8 mA respectively and RL is 2 k`Omega`. If VCE is 7.6 V, then VCC is ____________.
In a silicon transistor, a change of 7.89 mA in the emitter current if produces a change of 7.8 mA in the collector current, then the base current must change by ____________.
The current gain `alpha` of a transistor is 0.95. The change in collector current corresponding to a change of 0.4 mA in the base current in a common emitter arrangement is ______.
In a transistor, the thickness of the base region ____________.
In transistor amplifier, base-emitter junction is forward biased and collector emitter junction is reverse biased. The current gain is ______.
In common emitter mode of transistor, the d.c. current gain is 20, the emitter current is 7 mA. The collector current is ______.
In common emitter amplifier, a change of 0.2 mA in the base current causes a change of 5 mA in the collector current. If input resistance is 2K `Omega` and voltage gain is 75, the load resistance used in the circuit is ______.
A transistor having α = 0.8 is connected in a common emitter configuration. When the base current changes by 6 mA, the change in collector current is ______
In a p-n-p transistor circuit, the collector current is 10 mA. If 90% of the holes emitted from the emitter reach the collector, ______.
How is a transistor biased for operating it as amplifier?
When an n-p-n junction transistor is used as an amplifier in common emitter mode, ______.
For a common emitter transistor configuration the ratio of `I_c/I_E` = 0.96, then the current gain in this configuration is ______.
