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Electronic Devices and Circuits Online Quizzes - Section 10

1. The feature of an approximate model of a transistor is






2. A transistor has hfe=100, hie=2kΩ, hoe=0.005mmhos, hre=0. Find the output impedance if the lad resistance is 5kΩ.






3. A transistor has hie =2kΩ, hoe=25µmhos and hfe=60 with an unbypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance?






4. A CE amplifier when bypassed with a capacitor at the emitter resistance has






5. A transistor has hie =1KΩ and hfe=60 with an bypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance?






6. In the given circuit, find the equivalent resistance between A and B nodes.

                                                         





7. Which of the following acts as a buffer?






8. Which of the following is true?






9. In an NPN silicon transistor, α=0.995, IE=10mA and leakage current ICBO=0.5µA. Determine ICEO.






10. In CB configuration, the value of α=0.98A. A voltage drop of 4.9V is obtained across the resistor of 5KΩ when connected in collector circuit. Find the base current.






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