Does the collector current increase or decrease if VCC is reduced Why?

If you increase the voltage across the resistor, by increasing Vcc, then the current will increase. If you reduce the resistance value of RC while VCC and VCESAT remain unchanged, then the current will increase.

How does collector current increase?

Collector Current

It increases for larger emitter currents because the larger number of electrons injected into the base exceeds the available holes for recombination so the fraction which recombine to produce base current delines even further. Use of the current gain beta.

Does the collector base voltage affect collector current?

collector current depends upon the base current and voltage supply(vcc) applied. here base current is constant than collector current depends upon applied voltage. if applied voltage is constant than collector current depends upon load(R) applied between collector terminal and battery voltage.

What effect does increasing collector voltage have on collector current?

It is an exponential relationship that is described by the Ebers-Moll equations. An increase in this voltage results in increased currents in both the base and the collector, and indeed, an increase in base current causes an increase in B-E voltage.

What does collector current depend on?

As the temperature of a transistor increases, the collector current will increase because: Intrinsic semiconductor current between the collector and base increases with temperature. Its flow through the biasing resistors drives the base more positive, increasing forward bias on the base-emitter diode.

Collector Feedback Bias Circuit

Why is Collector current constant?

A very simple answer - the collector current is like a water going through a pipe. If at a given pressure the water flow rate throug a given crosssection of the pipe is reached the flow of the water will be constant.

On which of the following does the collector current does not depend upon?

On which of the following does the scale current not depends upon? Explanation: The saturation current does not depends upon the volume of the base-emitter junction. Instead it depends upon the area of the cross section of the base-emitter junction in a direction perpendicular to the flow of current.

What happens to the collector current if the emitter current increases while no base voltage is applied?

Explanation: When no voltage is provided at the base then no current passes from emitter to collector, so even if very high potential difference is applied at the emitter collector junction, no current flows through it.

What is the relationship between emitter current and collector current in a AC voltage?

Generally, the current that flows from the emitter to the collector or vice versa is the base current times the DC current gain (h_FE).

What happens when the collector current is increased in a transistor?

As the temperature of a transistor increases, the collector current will increase because: Intrinsic semiconductor currrent between the collector and base increases with temperature. Its flow through the biasing resistors drives the base more positive, increasing forward bias on the base-emitter diode.

How is base current related to collector current?

The base current controls the collector current when the transistor is in the active region. A transistor is made up of two PN junctions, an emitter junction and a collector junction. The active region is when the emitter junction is forward biased and the collector junction is reverse biased.

When a transistor is operated in the active region changes in the collector supply voltage VCC?

When a transistor operates in the active region, does the collector current, IC , respond to changes in VCC? When a transistor is operated in the active region, changes in the collector supply voltage VCC have little or no effect on collector current.

Why does the collector current of a BJT in the active region increase with the increase in collector voltage for a given base current?

The base current in the BJT is due to the recombination of holes and electrons. To neutralize the p region an electron leaves the p region. If we take it the other way round, the larger the base current the greater is the recombination, so the collector current should reduce, but Beta Ic/Ib.

What is a collector current?

The collector current, along with the base current, is a product of the energy produced through the emitter circuit, which is divided at the base current's generation through the transistor. Only a fraction of the exiting current is base current, and the remaining portion is considered the collector current.

Why base current is less than collector current?

Answer: Explanation: Base is much narrower and thinner than collectors,hence the majority of charge carriers are received by collector. Hence,collector current is greater than base current.

What is the most important fact about the collector current?

What is the most important fact about the collector current? It is measured in milliampere. It equals the base current divided by the current gain.

What is the voltage difference between collector and emitter in the circuit?

A small voltage drop will form between those nodes. Transistor datasheets will define this voltage as CE saturation voltage V_CE(sat) -- a voltage from collector to emitter required for saturation. This value is usually around 0.05-0.2V.

What is the relation between currents ie IC and IB of emitter collector and base of BJT?

Since the physical construction of the transistor determines the electrical relationship between these three currents, (Ib), (Ic) and (Ie), any small change in the base current ( Ib ), will result in a much larger change in the collector current ( Ic ).

How much is the collector emitter voltage VCE when the transistor is cut off?

When the transistor is either in saturation or cutoff modes, it dissipates little power. When in cutoff, there is no current flow between collector and emitter thus P = Vce ∗ Ic = 0.

Can base voltage be higher than collector voltage?

If the base voltage is higher than the collector voltage, and the base voltage is higher than the emitter voltage, the transistor is in the "saturation mode" of operation. Current will be flowing into the base (or out of base for PNP). This is something you can enter into a search engine for better understanding.

When the collector current in a transistor is zero the transistor is?

When a transistor has zero current through it, it is said to be in a state of cutoff (fully nonconducting). When a transistor has maximum current through it, it is said to be in a state of saturation (fully conducting).

When the signal is applied the ratio of change of collector current to the ratio of change of base current is called?

When the signal is applied, the ratio of change of collector current to the ratio of change of base current is called ac current gain.

In which configuration current gain of an amplifier is low?

Detailed Solution. The configuration in which the current gain of the transistor amplifier is lower is a common base.

Who invented BJT?

Transistors such as the one shown in Figure 1 are called bipolar junction transistors. Bipolar junction transistors (BJTs) were invented in late 1947 by William Shockley, Walter Brattain and John Bardeen at AT&T Bell Laboratories.

What is stability factor?

Explanation: Stability factor is defined as the rate at which collector current changes when Base to emitter voltage changes, keeping base current constant. It can also be defined as the ratio of change in collector current to change in base current when temperature changes occur.