NEET Practice Questions (MCQs) with Answers & Solutions

The emitter-base junction of a transistor is …… biased while the collector-base junction is ……. biased

If $\mathrm{\alpha }$ = 0.98 and current through emitter ${\mathrm{i}}_{\mathrm{e}}$ = 20 mA, the value of $\mathrm{\beta }$ is 

In a PNP transistor working as a common-base amplifier, current gain is 0.96 and emitter current is 7.2 mA. The base current is 

 If ${\mathrm{l}}_1$, ${\mathrm{l}}_2$, ${\mathrm{l}}_3$ are the lengths of the emitter, base and collector of a transistor then 

In an NPN transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, the emitter current (${\mathrm{i}}_{\mathrm{E}}$) and base current (${\mathrm{i}}_{\mathrm{B}}$) are given by 

In a common emitter transistor, the current gain is 80. What is the change in collector current, when the change in base current is 250 $\mathrm{\mu }$A 

Least doped region in a transistor 

The transistors provide good power amplification when they are used in 

The transfer ratio of a transistor is 50. The input resistance of the transistor when used in the common-emitter configuration is 1 K$\mathrm{\Omega }$. The peak value for an A.C input voltage of 0.01 V peak is 

For a transistor the parameter $\mathrm{\beta }$ = 99. The value of the parameter $\mathrm{\alpha }$ is