GATE Electrical Engineering (EE) Test: Transistor Biasing & Thermal Stabilization

If a change in base current does not change the collector current, the transistor amplifier is said to be

In a BJT, if the collector junction is reverse biased and the emitter junction is reverse - biased, it is said to operate in

On applying a positive voltage signal to the' base of a normally biased n-p-n CE transistor amplifier

Assertion (A): The process of giving proper supply voltages and resistances for obtaining the desired Q-point is called biasing.
Reason (R): In order to produce distortion free output in amplifier circuits, the supply voltages and resistances in the circuit must be suitably chosen.

Match List-I (Transistor parameters) with List-ll (Temperature effect) and select the correct answer using the codes given below the lists:
List-I
A. Base-emitter voltage (V_BE)
B. Transistor current gain (β)
C. Reverse saturation current (I_co)

List-ll
1. Independent of temperature
2. Decreases by 2.5 mV per ^oC
3. Increases with temperature
4. Increase by 7% per ^oC

For the transistor circuit shown below, the Q-point values are given as I_CQ = 1 mA and V_CEQ = 6V 

If V_BE (on) = 0.7 V, the values of the R_B and R_c will be respectively

For the transistor circuit shown below,β = 100 and V_BE(on) = 0.7 V.

The transistor is working under

In a collector-to-base CE amplifier circuit having V_cc = 12 V, R_c = 250 Ω , I_B = 0.25 mA, β = 100 and V_CEQ = 8 V, the stability factor will be approximately given by (neglect V_BE)

A self-bias circuit (with an emitter resiistor) stabilizes the__________  of the circuit against variations in temperature and process parameters.

In typical circuits, the stabilization factor S = (ΔI_CI_CO) is