What is the input current in the common-emitter circuit?

1 Answer

Answer :

Base current (IB).

Related questions

Description : A common-emitter circuit has an input voltage of 0.1 volt, an output voltage of 2.0 volts, an input current of 0.5 milliamps, and an output current of 10 milliamps. What is the power gain? A. 20 B. 40 C. 400 D. 4000

Last Answer : Answer: C

Description : What is the polarity of the first alternation of the tank circuit in an emitter-loaded npn pulsed oscillator?

Last Answer : Negative

Description : In the illustration, the small battery and Rb are in the circuit to apply ________. EL-0022 A. forward bias to the emitter-base B. reverse bias to the emitter-base C. a 'reference charge' on the input capacitor D. a buffer between the input ground and the emitter ground

Last Answer : Answer: A

Description : The common-emitter transistor circuit can amplify a small current signal because a small change in the signal current produces one of the following. Does the change in signal produce a large change in the: w) emitter-base voltage x) base current y) collector current z) collector voltage

Last Answer : ANSWER: Y -- COLLECTOR CURRENT

Description : 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 

Last Answer : In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the base current is: 100 µA

Description : How is the output signal developed in the common-emitter detector?

Last Answer : By the collector current flow through R4.

Description : Which junction of the transistor in the common-emitter detector detects the modulation envelope?

Last Answer : Emitter-base junction

Description : What causes the change in collector current in an emitter injection modulator?

Last Answer : Gain is varied by changing the voltage on the emitter.

Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0022 A. common base B. reverse bias, negative feedback C. common emitter D. common collector

Last Answer : Answer: C

Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0045 A. common emitter B. common collector C. darlington paired, capacitor coupled D. common base

Last Answer : Answer: D

Description : Besides eliminating the emitter-base battery, what other advantages can different biasing methods offer?

Last Answer : Compensation for slight variations in transistor characteristics and changes in transistor conduction because of temperature variations.

Description : the voltage drop across RS and R1 determines the amount of base-emitter ____ for Q1.

Last Answer : Bias.

Description :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be A) 0.98 B) 0.41 C) 59 D) 55  

Last Answer :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be 0.98 

Description : In a circuit such as that shown in figure 3-16, if R1 has a value of 50 ohms and R2 has a value of 250 ohms and the input signal has a value of +10 millivolts, what is the value of the output signal?

Last Answer : 60 millivolts.

Description : In a circuit such as that shown in figure 3-15, if R1 has a value of 100 ohms and R2 has a value of 1 kilohm and the input signal is at a value of + 5 millivolts, what is the value of the output signal?

Last Answer : 50 millivolts.

Description : When a circuit uses cathode biasing, the input signal can cause varia

Last Answer : Through the use of a bypass capacitor

Description : In a properly functioning circuit, can both the input and output of an inverter be HIGH at the same time?

Last Answer : No.

Description : The input impedance of your test equipment should exceed the impedance of the circuit under test by what ratio?

Last Answer : 10 to 1

Description : What impedance relationship between the output of one circuit and the input of another circuit will provide the maximum power transfer?

Last Answer : Equal impedance.

Description : If the output of a circuit needs to be a complete representation of one-half of the input signal, what class of operation is indicated?

Last Answer : Class B operation.

Description : What is the output current in the common-collector circuit?

Last Answer : IE.

Description : What is the current gain in a common-base circuit called?

Last Answer : Alpha (α).

Description : In the illustration, the large battery and R(L) are in the circuit to ________. EL-0022 A. forward bias the emitter-base B. reverse bias the emitter-base C. forward bias the emitter/collector D. reverse bias the emitter/collector

Last Answer : Answer: D

Description : An emitter follower circuit is widely used in electronic instruments because  (A) Its voltage gain is less than unity  (B) its output impedance is high and input impedance is low  (C) its output impedance is low and input impedance is high  (D) none of the above

Last Answer : Don't no happy be

Description : What is an emitter follower BJT circuit ? (A) Common Collector Amplifier (B) Common Emitter Amplifier (C) Common Base Amplifier (D) None of the above

Last Answer : What is an emitter follower BJT circuit ? (A) Common Collector Amplifier (B) Common Emitter Amplifier (C) Common Base Amplifier (D) None of the above

Last Answer : Beta in grounded emitter circuit is very high due to base current in small compared to collector current.

Description : Explain open emitter BJT drive circuit.

Last Answer : open emitter BJT drive circuit:

Description : The diagram shown in the illustartion represents a/an _____________. EL-0022 A. magnectic amplifier B. common base amplifier C. common collector amplifier D. common emitter amplifier

Last Answer : Answer: D

Description : Draw output characteristics of common emitter [CE] configuration and explain active, saturation and cut-off regions in detail. 

Last Answer : Characteristics of common emitter [CE] configuration Explanation :  (1) Active Region: In this region collector junction is reverse biased and emitter junction is forward biased. It is ... the transistor collector current is approximately given by VCC / RC and independent of base current. 

Description : Why common emitter configuration is commonly used?

Last Answer : Common emitter configuration is commonly used for amplifications because 1. The common emitter configuration (CE) provides maximum voltage and current gain and hence provides maximum power gain. The ... automatic impedance matching maximum power transfer will take place from one stage to other.

Description : A certain common-emitter amplifier has a voltage gain of 100. If the emitter bypass capacitor is removed.  a. The circuit will become unstable b. The voltage gain will decrease  c. The voltage gain will increase d. The circuit will become stable

Last Answer : B

Description : In BJT, the common emitter gain β is (A) desired to have large value (B) desired to have small value (C) desired to have moderate value (D) the value need not be controlled

Last Answer : In BJT, the common emitter gain β is desired to have large value.  β is the Current gain factor also called transport factor. 

Description : The ac bypassing of RF by CF in a common emitter configuration :  (A) increases ac signal across emitter -base junction (B) decreases ac signal across emitter -base junction (C) decreases voltage amplification (D) stabilizes the Q -point

Last Answer : The ac bypassing of RF by CF in a common emitter configuration : increases ac signal across emitter -base junction

Last Answer : In a common emitter amplifier, the unbypassed emitter resistance provides negative-voltage feedback

Last Answer : When a transistor is connected in common emitter mode, it with have medium input resistance and high output resistance.

Description : Which of the following actions can be carried out in order to prevent thermal runaway in a transistor? A. Increase the current through the collector-base junction. B. Install a heat sink. ... point to increase collector current. D. Increase the potential difference between the emitter and the base.

Last Answer : Answer: B

Description : Under ideal conditions, the collector current is (a) Equal to base current (b) Nearly equal to emitter current (c) Less than base current (d) always zero

Last Answer : (b) Nearly equal to emitter current

Description : In a transistor, the conventional current flows from base to emitter. The transistor is (a) NPN (b) PNP (c) FET (d) None of these

Last Answer : (a) NPN

Description : In p-n-p transistor, collector current is (a) Equal to emitter current (b) slightly less than emitter current (c) greater than emitter current (d) any of above

Last Answer : (c) greater than emitter current

Description : The current gain of emitter follower is: A) less than one B) more than one C) zero D) unpredictable

Last Answer : The current gain of emitter follower is: more than one 

Description : What is the most common type of integrated circuit packaging found in military equipment?

Last Answer : DIPs (dual inline packages).

Description : The area between base 1 and base 2 in a UJT acts as what type of common circuit component?

Last Answer : Variable resistor.

Description : To what circuit arrangement is a common-base detector equivalent?

Last Answer : A diode detector followed by a stage of audio amplification.

Description : What is the band of frequencies called that is included between the two points at which current falls to 70 percent of its maximum value in a resonant circuit?

Last Answer : Bandwidth of the circuit

Description : When is line current minimum in a parallel-LC circuit?

Last Answer : At the resonant frequency.

Description : In a parallel-resonant circuit, what is the relationship between impedance and current?

Last Answer : Maximum impedance, minimum current.

Description : In a series-RLC circuit, what is the condition of the circuit if there is high impedance, low current, and low reactance voltages

Last Answer : Nonresonant (circuit is either above or below resonance)

Description : . In an "ideal" resonant circuit, what is the relationship between impedance and current?

Last Answer : Impedance low Current high.