Electronics - Bipolar Junction Transistors (BJT) - Discussion

13. 

A transistor may be used as a switching device or as a:

[A]. fixed resistor
[B]. tuning device
[C]. rectifier
[D]. variable resistor

Answer: Option D

Explanation:

No answer description available for this question.

Girish said: (Jan 8, 2011)  
by transistor current can be vary so resistance can also varies by increasing or decreasing the battery voltage

Boopathi . S said: (Jun 27, 2011)  
TRANSICTOR MEANS TRANSFER RESISTOR , IN A TRANSISTOR I/P SIGNAL IS GIVEN TO LOW RESISTANCE PATH , O/P IS TAKEN FROM HIGH RESISTANCE SIDE ,SO RESISTANCE IS VARIABLE IN TRANSISTOR .

Ram said: (Apr 22, 2013)  
We can change the o/p current by changing the i/p resistance so transistor is used as a variable resister.

Mandeep Singh Saini said: (May 19, 2014)  
Case 1: If transistor is in OFF condition collector current is High. output voltage Vo = logic 1 = Zero or Min resistance path.

Case 2: If transistor is in ON condition collector current Ic is LOW.because (Ic =Ib+Ie) total current goes to emitter terminal or ground. So output voltage Vo=logic 0 = Max resistance path.

Both cases resistance is variable Min(0) to Max(1).

Anomieee said: (May 30, 2019)  
Transistor is itself a transfer of resistance (trans-istor means trans-resistor named by it).

Base or input side high to output side is low resistance offered.

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