# A Transistor has - - - PN junctions

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A Transistor has Two PN junctions

## Related questions

A transistor has a typical value of β = 200 , If the collector current is 15 mA, then base current will be

A transistor has ________ number of terminals. (A) 2 (B) 3 (C) 1 (D) 4

The leakage current of PN junction is caused by?

In a transistor Colpitts oscillator, C1 = 0.001 µF, C2 = 0.01 µF and L = 5 µH. The frequency of oscillation in MHz will be (a) 2.37 MHz (b) 10.00 MHz (c) 11.54 MHz (d) 9.09 MHz

Beta cut-off frequency of a transistor is the frequency at which the Beta is • 0.707 of low frequency value • Zero • Equal to low frequency value • None of the above.

If a transistor were operated with emitter and collector interchanged, then  1 .emitter current will increase  2. Collector current will increase  3. Base current will decrease  4. No current flow will take place

In a transistor  1. Emitter is heavily doped while the collector is moderately doped 2. Collector base junction is forward biased 3. Emitter is made wider than collector 4. The input resistance is much higher than output resistance

ICB0 in a transistor can be reduced by reducing:  (1) IB (2) VCC (3) IE (4) Temperature

For a transistor, Ceb=20pF, Ccb=5pF, re=1kOhm. Its figure of merit (in MHz) is about  A) 65 B) 650 C) 130 D) 13

Maximum junction temperature and maximum ambient temperature of a power transistor (in degree Centigrade) are 150 and 52. The set level power dissipation is 32 watts, transistor thermal factor is 0.7 and of mica washer is 0.5.Thermal resistivity of heat sink (in degree C/W) is  A) 1.8 B) 3.2 C) 6.4 D) 9.8

What is thermal runaway of a transistor?

What is the main use of a transistor?

Why biasing is required for a transistor?

The number of p-n junctions in a thyristor are  A)1 B) 2 C) 3 D) 4

In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the base current is: (1) 10 µA (2) 100 µA (3) 1 A (4) 10 A

The set of transistor characteristics which enable α to be determined directly from the slope is (a) CB transfer characteristics (b) CE transfer characteristics (c) CB input characteristics (d) CE output characteristics

In an npn transistor, _____ are the minority carriers.   (a) Free electrons (b) Acceptor ions (c) Donor ions (d) Holes

For an NMOS transistor, Vt= 2 V, Vgs= 3 V, Vdd= 10 V,µnCox=20 µA/V2 , L=10 meter, W= 400 µmeter. The drain current (in mA) is  A) 2 B) 1.2 C) 0.4 D) 0.2

In IC fabrication, the common form of PNP transistor is  A) Vertical PNP B) Lateral PNP C) Triple diffusion PNP D) Substrate PNP

What is meant by stabilization in transistor?

What is self biasing of transistor?

can transistor amplify dc?

Plot and explain I -V characteristics of a PN junction diode.

A forward-biased PN-junction,  (A) results in increase in diffusion current  (B) results in increase in drift current  (C) results in decrease in drift current  (D) results in decrease in diffusion current

In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping (A) N-side depletion region is small as compared to p-side depletion region (B) N-side depletion region is large as compared to p-side depletion region (C) N-side depletion region is same as p-side depletion region (D) Cannot say

An electrical circuit with 10 branches and 7 junctions will have

When cathode is positive with respect to anode in an SCR, the number of blocked p-n junctions is   (a) 1 (b) 2 (c) 3 (d) 4

A differential amplifier has a differential gain of 28000 and CMRR is 60 dB. What will be the value of common mode gain? A) Ac = 0.125 B) Ac = 0.33 C) Ac = 3 D) Ac = 28

An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance