# Electronic Devices and Circuits 1

Engineering  physics ,Electronic Devices and Circuits

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Electronic Devices and Circuits 1

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Q1)    This set of Electronic Devices and Circuits Mcqs focuses on “The AC Analysis of a Small-Signal Low-Frequency Common Emitter Transistor”.

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

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

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

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4. 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?

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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?

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7. Which of the following acts as a buffer?

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8. Which of the following is true?

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

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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