Advertisements
Advertisements
प्रश्न
Define α.
Define the current gain αDC for a transistor.
Advertisements
उत्तर
The dc common-base current ratio or current gain (αdc) is defined as the ratio of the collector current (Ic) to emitter current. (Ig)
`alpha_"dc" = "I"_"C"/"I"_"E"`
संबंधित प्रश्न
In a BJT, the largest current flow occurs ______.
Derive the relation between α and β.
Which method of biasing is used for operating a transistor as an amplifier?
For a transistor β =75 and IE = 7.5 mA. The value of α is ______
Explain the working of the PNP transistor?
The output of the following circuit is 1 when the input ABC is
Give the Barkhausen conditions for sustained oscillations.
Transistor functions as a switch. Explain.
A transistor has a voltage gain A. If the amount βA of its output is applied to the input of the transistor, then the transistor becomes oscillator, when ______.
If l1, l2, l3 are the lengths of the emitter, base and collector of a transistor, then ____________.
For a transistor, the current ratio 'βdc' is defined as the ratio of ______.
In switching circuit, transistor is in ON state. Values of IC and IB are 5.2 mA and 10 µA respectively and value of RC is 1 k`Omega`. If Vcc is at 5.5 V, then VCE is ______.
Ve, Vb, and Ve are emitter, base, and collector voltage respectively for npn transistor in CE mode. Amplifier works for the combination of biasing voltage equal to ______.
In an npn transistor, the base current is 100 µA and the collector current is 10 mA. The emitter current is ______.
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 an npn transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, the emitter current (IE) and base current (IB) are given by ____________.
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 ____________.
In a transistor, a change of 8.0 mA in the emitter current produces a change of 7.8 mA in the collector current. Then change in the base current is ____________.
A transistor is connected in C - E mode. If collector current is 72 × 10-5 A and α = 0.96, then base current will be ______.
In the common-emitter configuration of a transistor, the current gain is more than 1 because [lb, le, and lc are base, emitter, and collector currents respectively] ______
A conducting wire has length 'L1' and diameter 'd1'. After stretching the same wire length becomes 'L2' and diameter 'd2' The ratio of resistances before and after stretching is ______.
For a transistor, αdc and βdc are the current ratios, then the value of `(beta_"dc"-delta_"dc")/(alpha_"dc".beta_"dc")`
The reverse bias in a junction diode is changed from 8V to 13V, then the value of the current changes from 40μA to 60μA. The resistance of junction diode will be ______.
A common emitter amplifier circuit built using an n-p-n transistor is shown in the figure. Its DC current gain is 300, RC = 4 kΩ and VCC = 20 V. What is the minimum base current for VCE to reach saturation?
The current amplification factor for a transistor in its common emitter mode is 50. The current amplification factor in the common base mode of the transistor is ______.
Explain the output characteristics of common emitter configuration of n-p-n transistor.
