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Transistor Radio does not work satisfact...

Transistor Radio does not work satisfactorily when used inside a railway carriage .
a . Justify your answer .
b . What happens in a transistor when both the emitter and collector are reverse biased ?
c. What is this condition known as ?
d. Under what condition a transistor works as an open switch ?

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a. The iron frame of railway carriage acts as a magnetic screen . It does not allow the electromagnetic wave signal coming from transmitter to enter the carriage .
b . No current flows through the transistor .
c. Cutoff state
d. When both the emitter and collector are reversed biased
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NEW JOYTHI PUBLICATION-SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS -EVALUATION QUESTIONS AND ANSWER
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  2. Which configuration is widely used in circuits ?

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  3. What is the name of the device in which AC is converted into DC ?

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  4. What is the name of the device in which DC is converted into AC ?

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  5. How can you keep the LC oscillation undamped ?

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  6. What the different gains in a transistor ?

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  11. State whether true or false and justify . a Zener diodes are used u...

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  12. In both p and n type semiconductors , actually electrons are flowing ....

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  13. A greenhouse has an electronic system (block diagram is given below ) ...

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  19. Why are NAND and NOR gate called universal gate ?

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