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insulator > semiconductor > conductor

Insulator > Semiconductor > Conductor

#### SIMILAR QUESTIONS

Q1

A change of 0.2 mA in base-current causes a change of 5 mA in the collector-current for a common-emitter amplifier. Find the a-c current gain of the transistor.

Q2

In an n-p-n transistor, 1010 electrons enter the emitter in 10–6 s. 2% of the electrons are lost in the base. Calculate the current transfer ratio and the current amplification factor. Charge on electron is .

Q3

A transistor is connected in common-emitter configuration. The collector-supply is 8 V and the voltage drop across a resistor of  in the collector circuit is 0.5 V. If the current-gain factor  is 0.96, find the base-current.

Q4

p-n-p transistor is used in common-emitter mode in an amplifier circuit. A change of  in the base-current brings a change of 2 mA in collector-current and of 0.04 V in base-emitter voltage. Find the input resistance  and the base-current amplification factor . If a load resistance of  is used, then find the voltage-gain of the amplifier.

Q5

A transistor has three impurity regions. All the three regions have different doping levels. In order of increasing doping level, the regions are :

Q6

When the emitter current of a transistor is changed by 1 mA, its collector current of a transistor is changed by 0.990 mA. The common base circuit current gain for the transistor is :

Q7

In case of n-p-n transistor the collector current is always less than the emitter current because :

Q8

Transistors are :

Q9

Which one of following gates can be served as a building block for any digital circuit?

Q10

In the case of constants  of a transistor :