# What is the current gain?

What is the current gain?

Current gain β = Ic/Ib

## Related questions

Description : Which configuration has the lowest current gain ?

Answer : Common base configuration has the lowest current gain.

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

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 : 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

Answer : 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

Description : The effect of a finite gain of an operational amplifier used in an integrator is that (A) it would not integrate (B) the slope of the output will vary with time (C) the final value of the output voltage will reduce (D) there will be instability in the circuit

Answer : The effect of a finite gain of an operational amplifier used in an integrator is that there will be instability in the circuit

Answer : The voltage gain of triode depends on plate voltage.

Description : The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is increased to 10 V/V? A) 100 MHz B) 1 MHz C) 10 MHz D) 1 kHz

Answer : The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is increased to 10 V/V? A) 100 MHz B) 1 MHz C) 10 MHz D) 1 kHz

Description : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth

Answer : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth

Description : What is Mason's gain formula?

Answer : Mason's Gain Formula

Description : What is the gain of an op amp?

Description : Define gain and bandwidth of an amplifier.

Answer : Bandwidth  The range of frequency over which the voltage gain is equal to or greater than 70.7% of its maximum value Gain: The ratio of output parameter (voltage/ current /power) to the input parameter (voltage/ current /power) of an amplifier is known as gain. It is denoted by a letter A

Description : A differential amplifier has a differential gain of 20,000, CMRR : 80 dB. The common mode gain is given by

Answer : A differential amplifier has a differential gain of 20,000, CMRR : 80 dB. The common mode gain is given by 2

Description : A transfer function has a second order denominator and constant gain in the numerator

Answer : A transfer function has a second order denominator and constant gain in the numerator the system has two zeros at infinity

Description : An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is  (1) 141 (2) 92.3 (3) 9.23 (4) 1.41

Answer : An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is 9.23

Description : The voltage gain of a common -source JFET amplifier depends up on its  (1) Input impedance (2) Amplification factor (3) Dynamic drain resistance (4) Drain load resistance

Description : If the gain of the open loop system is doubled, the gain margin  (1) Is not affected (2) Gets doubled (3) Becomes half (4) Becomes one -forth

Answer : If the gain of the open loop system is doubled, the gain margin Becomes half

Description : The gain of an ideal amplifier must be

Answer : The gain of an ideal amplifier must be infinity

Answer : In Reverse bias of diode when the cathode is connected to positive and anode is connected to negative very small current flows this very small current is known as leakage current of diode.

Description : Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset voltage

Answer : Definition of parameters of OPAMP is follows:  i) Input Offset Voltage: Input offset voltage is defined as the voltage that must be applied between the two input terminals of an OPAMP to null or ... to ground) and output voltage is obtained non zero such voltage is output offset voltage of opamp.

Description : The leakage current of PN junction is caused by?

Answer : The leakage current of PN junction is caused by heat energy.

Answer : In  BJT  there  is  movement  of   electrons  and  holes   accros  the  junctions  which  is  basicaly  current  flow.

Description : What kills, current or voltage?

Answer : Current would kill. You can actually have thousands of bolts going through you and not even know it. Yes you probably know already voltage is current times resistance. Since your body is a resistor it would take just a small amount of current to create a very high voltage

Description : A) Watt B) Volts C) Farad D) Ampere

Description : What is the relationship between power and current?

Answer : P = I2R Where P = power I = Current R = Resistance This the relationship between current and power.

Description : What happens to the resistance when the current increases?

Answer : Resistance  reduces  when  current  increases.

Description : What will happen if you increase the current in the motor?

Answer : Increasing current means increasing frequency of the motor because current is directly proportional to rotations of the motor rotor

Description : What is the difference between eddy current and hysteresis loss?

Answer : Loss occurred by magnetising and demagnetising process is called histerisis loss and the current flowed due to the magnetic field produced by the electric field applied is called eddy current losses

Description : What happens when a current flows through a wire?

Answer : Current can produce two effect one is heating effect and second is magnetic effect.

Description : What happens when you reverse the direction of the current in an electromagnet?

Answer : When  you  reverse  current  direction  in  an  electromagnet,  the magnetic  poles  will  also  change.

Description : What is the direction of an AC current?

Answer : The magnitude and direction of alternating current is changes with respect to time. So for half cycle it is positive and for next half cycle it is negative.

Description : What is the direction of the induced current?

Description : What is the direction of flow of current?

Answer : Current  flows  from  anode  to  cathode(opposite  direction  to  flow of  electrons)

Description : What is the direction of the conventional current flow?

Answer : The conventional current flow in opposite direction of flow of electrons. The electrons flow from negative terminal of battery to positive terminal of battery. And conventional current flow from positive terminal of battery to negative terminal of battery.

Description : What is the direction of flow of electric current in an electric circuit?

Answer : It  flows  from  anode  to  cathode  (direction  of   holes  flow)

Description : What type of meter is used to measure current?

Description : What is the difference between line and phase current?

Answer : The currents flows through phase lines is called line voltage and currents flows from phase to neutral line is called phase current

Description : What is current harmonics?

Description : What is holding current and latching current in SCR? Draw the gate characteristics of an SCR and explain the characteristics. What are the different signals which can be used for turning on SCR by gate control? compare them.

Answer : (i) Holding Current: Holding current is defined as the minimum anode current required to maintain conducting SCR in the on-state.  (ii) Latching Current: Latching current is defined as the ... the on-state immediately after the SCR has been turned on and the gate signal has been removed.

Description : what is eddy current ?

Answer : In magnetic circuits when we supply current to coil which wound on some core( of iron cast iron, ferrite ) material it produce magnetic field but there is small amount of flux which also ... heat and losses in magnetic circuits..for good working conditions we always try to minimize eddy current

Description : what is current?

Answer : Flow of free electrons

Description : Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life.

Answer : 1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series.  2) ...   4) Effect on Life:- If supply voltage is not stable then life of LED get reduced.

Description : With the help of N-channel JFET describe the effect of input voltage VGS on output current ID.

Answer : Working of N channel FET: * When a voltage is applied between the drain and source with a DC supply (VDD), the electrons flows from source to drain through narrow channel ... where the channel gets completely blocked and the drain current becomes zero is called pinch- off voltage.

Description : Even at no-load, a transformer draws current from the mains. Why?

Description : Current division rule example

Answer : Current division rule example

Description : Current division

Answer : Current division

Description : A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

Description : Find the current through 4 ohm resistor by source transformation

Description : Source transformation voltage source to current source and vice versa

Description : Find current through resistor using nodal analysis

Answer : Find current through resistor using nodal analysis

Description : Nodal analysis problem two current source

Answer : Nodal analysis problem two current source

Description : Direct Current (DC) Next Topic : Alternating current (AC)

Answer : Direct Current (DC) is the unidirectional electric current. Uni meaning is one. And the flow of charge in same direction. We know that conventional current flow from positive terminal of battery to ... The magnitude of DC may constant or vary but direction do not change with respect to time.

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