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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) - CBSE (Science) Class 12 - Physics

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Question

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)

Solution

CE configuration is the most widely used transistor.

Variation of base current (IB) with the base-emitter voltage VBE is called input characteristics.

Variation of collector current IC with the collector − Emitter voltage VCE is called output characteristics

Input characteristics

Output characteristics

 

Parameters of Transistors

Input resistance (ri)

`r_i = ((triangleV_"BE")/(triangleI_B))_(V_"CE")`

ΔVBE − Base-emitter voltage

ΔIB − Base current

VCE − Constant collector-emitter voltage

Output resistance (r0)

`r_0 = ((triangleV_"CE")/(triangleI_C))_(I_B)`

ΔVCE − Collector-emitter voltage

ΔIC − Collector current

IB − Base current

Current amplification factor (β)

`beta_(ac) = ((triangleI_c)/(triangleI_B))_(V_(CE))`

IC − Collector current

IB − Base current

VCE − Constant collector-emitter voltage.

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Solution 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) Concept: Transistor and Characteristics of a Transistor.
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