Bissoy.com
Doctors Medicines MCQs Q&A

A transistor is used in common emitter mode as an amplifier. Then a. The base-emitter junction is forward biased b. The base-emitter junction is reverse biased  c. The input signal is connected in series with the voltage applied to the base-emitter junction  d. The input signal is connected in series with the voltage applied to bias the base-collector junction Which of the following statement is true?

A transistor is used in common emitter mode as an amplifier. Then a. The base-emitter junction is forward biased b. The base-emitter junction is reverse biased  c. The input signal is connected in series with the voltage applied to the base-emitter junction  d. The input signal is connected in series with the voltage applied to bias the base-collector junction Which of the following statement is true? Correct Answer a and c

CONCEPT:

  • A junction transistor is formed by sandwiching a thin layer of P-type semiconductor between two N-type semiconductors or by sandwiching a thin layer of n-type semiconductor between two P-type semiconductors.
  • Transistor as an amplifier: A device that increases the amplitude of the input signal is called an amplifier.

EXPLANATION:

  • In common emitter configuration, the emitter is common to both base and collector. 
  • Emitter base junction is always forward bias as a positive terminal of the battery is connected to the p-side of the transistor and the negative terminal of the battery is connected to the n-side of the transistor. Therefore, option1 is correct.
  • From the above figure it clear that the input signal is connected in series with the voltage applied to the base-emitter junction. Therefore option 3 is correct.   

Related Questions

Which of the following conditions must be satisfied for a transistor to be in saturation? 1. Its collector to base junction should be under forward bias 2. Its collector to base junction should be under reverse bias 3. Its emitter to base junction should be under reverse bias 4. Its emitter to base junction should be under forward bias Which of the above conditions are correct?
For transistor action (a) Base, emitter, and collector regions should have similar size and doping concentrations. (b) The base region must be very thin and lightly doped. (c) The emitter-base junction is forward biased and the base-collector junction is reverse biased. (d) Both the emitter-base junction as well as the base-collector junction are forward biased. Which one of the following pairs of statements is correct?
Consider the following statements regarding an N-P-N Bipolar Junction Transistor: 1. Emitter diode is forward biased and the collector diode is reverse biased 2. Emitter has many free electrons 3. Free electrons are injected into the base and pass through the collector 4. Depletion layers around junction J1 and J2 of BJT are widened. Which of the above statements are correct?
If CT is the transition capacitance, which of the following are true? 1) in forward bias, CT dominates 2) in reverse bias, CT dominates 3) in forward bias, diffusion capacitance dominates 4) in reverse bias, diffusion capacitance dominates
In NPN transistor, when emitter junction is forward biased and collector junction is reverse biased, the transistor will operate in
A transistor with emitter junction forward biased and collector junction reverse biased, is in its ________ mode.
A transistor with emitter junction reverse biased and collector junction forward biased is in its ________ mode.
If the emitter-base junction is forward biased and the collector-base junction is reverse biased, what will be the region of operation for a transistor?
When the collector junction is reverse biased and emitter junction is forward biased, the operating region of the transistor is called_________
Choose the right option among the alternatives – A transistor conducts in its forward direction when its collector/emitter/base, is positive with respect to its collector/emitter/base, and when a turn-on voltage or current signal is applied to its collector/emitter/base.