Define amplifier and amplification factor.

A triode value has amplification factor 21 and dynamic plate resistance 10 kOmega . This is used as an amplifier with a load of 20 kOmega) . Find the gain factor of the amplifier.

For transistor relation in current amplification factors is-

In a common base mode of a transition , the collector current is 5.488 mA for an emitter currect of 5.60 mA . The value of the base current amplification factor (beta) will be

A n-p-n transisitor is connected in common emitter configuration in a given amplifier. A load resistance of 800 Omega is connected in the collector circuit and the voltage drop across it is 0.8 V . If the current amplification factor is 0.96 and the input resistance of the circuits is 192 Omega , the voltage gain and the power gain of the amplifier will respectively be

A p-n-p transistor is used in common-emitter mode in an amplifier circuuit. A change of 40muA in the base current brings a change of 2mA in collector current and 0.04V in base-emitter volatage. Find the (a) input resistance r_(i) and (b) the base current amplification factor (beta) . (c ) if a load of 6kOmega is used, then also find the voltage gain of the amplifier.

The essential requirements for a gene amplification reaction are

Draw the diagram of the circuit arangement used for studying the 'input' and the 'output' characteristics of an n-p-n transistor inits CE configuration. Briefly explain how these two types of characteristics are obtained and draw these characteristics. (b) 'Define' the terms (i) Input resistance, (ii) Output resistance , (iii) Current amplification factor, for a given transistor.

(a) Draw the circuit arrangement for studying the input and output characteristics of an n-p-n transistor in CE configuration . With the help of these characteristics define (i) input resistance , (ii) current amplification factor . (b) Describe briefly with the help of a circuit diagram how an n-p-n transistor is used to produce self-sustained oscillations .

In an n-p-n transistor 10^(10) electrons enter the emitter in 10^(-6) s. If 2% of the electrons are lost in the base, find the current transfer ratio and the current amplification factor.

The power gain for common base amplifier is 800 and the voltage amplification factor is 840. The collector current when base current is 1.2 mA is