Transistor Questions - Beta.pdf PDF

beta (β) - it is the ratio of the output current Ic to the input current Ib. Voltage Divider Biased - Which transistor configuration is more stable? 8 - What is the solution to the equation log2x = 3 Common collector - Which BJT configuration exhibits a voltage gain less than unity? Saturation c...

beta (β) - it is the ratio of the output current Ic to the input current Ib. Voltage Divider Biased - Which transistor configuration is more stable? 8 - What is the solution to the equation log2x = 3 Common collector - Which BJT configuration exhibits a voltage gain less than unity? Saturation current - it is also called the maximum possible collector current. Common collector - which BJT configuration commonly used as a voltage buffer. Saturation region - It is where the load line intersects with the saturation point. Low efficiency - What is the main disadvantage of Class A amplifiers? Common emitter - Which BJT configuration offers the highest current gain? Quiescent point - It is the intersection between the loadline and the given value of Ib. 79 - Which of the following is the solution to the equation log 3(x+2)=4? Common base - In which BJT configuration is the input signal applied between the emitter and the base? Which is true? a. The collector terminal must always be forward biased regardless of the transistor type b. The collector terminal for PNP type transistor must be reversed biased c. The collector terminal for NPN type transistor must be forward-biased d. The collector terminal must be connected to the ground a p-type semiconductor - A trivalent impurity is added to silicon to create. The transistor will saturate - When the transistor is heated, what will happen to the transistor? Saturation current - It is also called the maximum possible current that can be delivered by the transistor. Common emitter - In which BJT configuration is the output signal taken between the collector and the emitter? Collector - The transistor terminal that handles most current. Common collector - Which BJT configuration is often used in RF amplifier circuits due to its high input impedance and low output impedance? Active - When the base-emitter junction is forward biased and Base-collector junction is reversed biased the transistor operation is in _____ Cut off - When the base-emitter junction is reversed biased and Base-collector junction is reversed biased the transistor operation is _____ Cut off voltage - It is also called the maximum possible VCE. N type semiconductor - It is the impurities that result in an excess of electrons, or negative charges. Common emitter - Which BJT configuration offers the highest power gain? Common emitter - In which BJT configuration is the emitter current the sum of the base and collector currents? Transistors - A semiconductor device that Amplifies, Oscillates, or Switches the flow of current between two terminals. John Bardeen, Walter Brattain, William Shockley - The scientists who were responsible for the 1947 invention of the transistor were. High-frequency signal amplification - Class C amplifiers are primarily used in which type of application? Class C - Which class of amplifiers has the highest efficiency? P type semiconductor - It is the material that lead to a deficiency of electrons and therefore an excess of positive charge carriers or "holes." Thermal energy - The electron-hole pair is produced by 0.3 V - The barrier potential for germanium devices is collector current, load resistance, supply voltage - Quiescent or Q-point position is dependent on Common emitter - Which BJT configuration offers the highest voltage gain? Silicon - The most widely used semiconductive material in electronic devices is In Class AB amplifiers, the biasing is set to ensure which of the following? a. Both transistors operate in active regions. b. Both transistors operate in the saturation region. c. Both transistors operate in the cut-off region. d. One transistor operates in the cut-off region and the other in the saturation region. Active - Class A amplifiers operate in which region of the transistor's characteristic curve? Class C - Which class of amplifier is commonly used in applications where efficiency is critical, such as in RF transmitters? What is true about transistor construction? a. The base-emitter junction is thicker than the base-collector junction b. The base-emitter junction is thinner than the base-collector junction c. The amount of base current cannot be measured d. Emitted is the lightly doped material voltage controlled amplifier - The bipolar junction transistor can perform the following functions, except Cut-off point - It is the point where the values of the collector current are equal to zero. High efficiency - What is the primary advantage of Class D amplifiers? 50.5 - What is the solution to the equation log10(2x-1) = 2? Infinite - Collector-emitter resistance of ideal transistor at cut-off Base - It is lightly doped material so that most of the charge carriers pass to the collector. Which of the following is a characteristic of Class AB amplifiers? a. Only one transistor conducts for 360 degrees. b. Only one transistor conducts for 180 degrees. c. Both transistors conduct for more than 180 degrees but less than 360 degrees. d. Both transistors conduct for exactly 180 degrees. Which of the following is a characteristic of Class D amplifiers? a. They use linear amplification techniques. c. They have low power efficiency. b. They operate as switch-mode amplifiers. d. They are primarily used for audio amplification. If Vce is less than or equal to zero OV the transistor is a. operational c. at saturation region- b. at cut-off region d. at active region alpha (α) - It is the ratio of the collector current to the emitter current. Class B amplifiers are most commonly used in which type of applications? a. Low-frequency signal amplification b. Audio power amplification c. RF amplification d. High-frequency signal amplification point-contact transistor - The original transistor is called Common collector - Which BJT configuration provides the highest input impedance? Switching amplifiers - Class D amplifiers are also known as. 8 - Which of the following is the solution to the equation 2 log2x = 6? Load line - It describes the values of Ic and Vce across the load from the cut-off to the saturated condition. Hign distortion - What is the main drawback of Class C amplifiers? beta (β) - It is also called the common collector forward current amplification factor. Common base - In which BJT configuration is the collector connected to the ground (or common reference)? 8 - What is the solution to the equation 3log2x = 9? When the transistor is off, what does it mean? a. The collector voltage is set equal to Vcc b. The collector current is set to its minimum value c. The transistor is in the active region d. The Q-point is set to saturation emitter - It is a highly doped material to inject a large number of charged carriers. When the value of base current is equal to zero, what does it mean? a. The base terminal is opened b. The collector current is approximately equal to the emitter current c. The transistor is saturated d. The transistor is active loadline - It is the locus of all possible operating points of a transistor unipolar - What device employs only electrons or holes? Common emitter - In which BJT configuration is the input signal applied to the base and output taken from the emitter? 180 degrees - In a Class B amplifier, each transistor conducts how much of the input cycle? Saturation - When the base-emitter junction is forward biased and Base-collector junction is forward biased the transistor operation is in ____ When Vce is a negative value, what does it mean? a. The transistor current will be set to its minimum value b. The transistor is in a cut-off region c. The Base current is zero d. The transistor current will be set to the maximum value collector - It is situated opposite to the emitter and always in reversed bias. Operating point - It is determined by Vce and Ic. Which of the following statements is true about Class A amplifiers? a. They have a low efficiency and high distortion. c. They have a low efficiency but low distortion. b. They have a high efficiency and low distortion. d. They have a high efficiency but high, distortion. Common emitter - Which BJT configuration provides the same polarity at both input and output terminals? Emitter follower - Which BJT configuration provides high input impedance and low output impedance? Cut off region - It is where the loadline intersects with the cut-off point. Which of the following statements is true about the transistor? a. The base material is thicker than other terminal c. The base material must always be P-type material b. The base terminal must not be connected to the ground d. The base-emitter voltage is always equal to the potential barrier high efficiency - What is the main advantage of Class C amplifiers? Emitter to collector - The flow of electrons in an NPN transistor when used in an electronic circuit is from 8.7 - What is the solution to the equation log5(3x-1) = 2? Common emitter - Which BJT configuration exhibits a phase shift of 180 degrees between input and output signals? The transistor is saturated - If the value of Vce is negative, what does it mean?