7.2.1 - Expression of Current Carried by Electrons
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Practice Questions
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What is the role of electrons in a BJT?
💡 Hint: Think about which particles are responsible for current flow.
Define reverse bias in the context of BJTs.
💡 Hint: Consider how voltage influences the flow of current.
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Interactive Quizzes
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What happens to electrons under reverse bias in a BJT?
💡 Hint: Consider the role of voltage in influencing current flow.
True or False: BJTs can operate as amplifiers only when junctions are very far apart.
💡 Hint: Reflect on the required conditions for transistor operation.
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Challenge Problems
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Given a BJT with a collector area of 2 cm², a diffusion constant of 25 cm²/s, and minority carrier concentration of 1 x 10^16 per cm³, calculate the collector current when the length is 0.5 cm.
💡 Hint: Make sure to convert units consistently.
Explain and derive the expression for current carried by electrons in a simplified circuit using values provided for a hypothetical BJT, including the role of junction positioning.
💡 Hint: Consider how each variable influences the others within the equation.
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