Semiconductor Electronics: Materials, Devices and Simple Circuits MCQs for NEET — Physics Questions with Answers

If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be

A diode having potential difference 0.5 V across its junction which does not depend on current, is connected in series with resistance of 20 $\mathrm{\Omega }$ across source. If 0.1 A passes through resistance then what is the voltage of the source

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

In a PNP transistor the base is the N-region. Its width relative to the P-region is 

A common emitter amplifier is designed with NPN transistor ($\mathrm{\alpha }$ = 0.99). The input impedance is 1 K$\mathrm{\Omega }$ and load is 10 K$\mathrm{\Omega }$. The voltage gain will be 

The most commonly used material for making transistor is

The part of a transistor which is heavily doped to produce a large number of majority carriers is-

For a transistor, the current amplification factor is 0.8. The transistor is connected in common emitter configuration. The change in the collector current when the base current changes by 6 mA is 

In a common base amplifier circuit, calculate the change in base current if that in the emitter current is 2 mA and $\mathrm{\alpha }$ = 0.98

For a transistor, in a common emitter arrangement, the alternating current gain $\mathrm{\beta }$ is given by